Fixes this flake:
https://github.com/oppia/oppia/runs/8274894328?check_suite_focus=true

* added tests for feconf

* nit

* added tests

* nit

* lint fix

* nit

* nit

*...

* Simplify the question editor code and remove unused variables and assignments. Handle alerts m...

* Try to fix blog page flake.

* Building blog post search service

* Fixing linting issue
...

* Fix ViewDestroyedError frontend flake

* Fix more FE flakes

* added wipeout_service

* added learner_progress

* added skill_services

* added exp_ser...

* Add filtering in language selection dropdown

* Fix linting issues

* Add missing closing ...

Fix validation for outcome labelled as correct

* Fix frontend validation for numeric input

* Fix tests

* added fix for assert

* nits

* nits

* reasoned out more asserts

* added changes

...

* feedback form arrow + indentation of the checkbox of stay anonymous

* feedback arrow issue ...

* Fix frontend validation for editing hint

* Fix unit test

* review test page

* practice-session

* done

* tilte editor and desc editor migrated

...

* load story page components once story data is available

* fix #15834

* fix #15204

* f...

* changes

* added stats_services

* added topic services

* improve typing style in stora...

Fix frontend validation for image caption length

* added tests for run_custom_eslint_tests.py

* added tests for run_tests.py

* added more t...

* Initial functions -- Bound with Save Destination button.

* Added support to calc distance a...

* initial commit

* add expansion feature

* completed UI

* added delete button

* addr...

* Update CHANGELOG

* Update AUTHORS

* Update CONTRIBUTORS

* Update core/feconf.py

* ...

* add a check for empty nodes in get_ordered_nodes

* remove resetEditor if the editor modal i...

* service file name changed to backend-api

* backend api file added

* previous service fil...

* Initial changes.

* Added for dest_if_really_stuck.

* Added catchMisspellings.

* Added...

* fix html select component logic

* use single quotes

fix misconception bug

* Fixed add to play later issue

* few more files migrated

* Migrated learnerDashboard test...

* add e2e tests

* fix test description

* remove unnecessary waitFors and include in lint c...

* adjusted carousel arrow

* adjusted carousel arrow

* adjusted carousel arrow

Co-author...

* Adds diagnostic test model.

* Created Classroom model.

* Adds backend test into the shar...

* added wipeout_service

* added learner_progress

* added skill_services

* added exp_ser...

* Replace material icons with FA icons

* Fix lint errors

* Fix lint errors

* Fix lint e...

* added learner group model

* added takeout and wipeout policy

* added learner group model...

* fix image region interaction drag offset to account for scroll location

* add row-gap for t...

* use yarn

* fix lint errors

* fix yarn.lock

* fix lockfile issues

* fix typo

* U...

* add service and part of the tests

* add tests and register service

* add type

* add c...

* added 2 files

* added partial changes

* removed all untyped call ignores

* added chan...

* Changes requested while evaluation

* nit

* nit

* done

* Adds diagnostic test model.

* Created Classroom model.

* Adds backend test into the shar...

* remove texts with set data format from translatable texts if the user is not a translation rev...

* fix typo

* Add topic title to subtopic display when screen size is small

* initial changes

* changes

* ui changes

* select skill difficulty modal

* ui fixes
...

* Refactored SuggestionThreadObjectFactory to model.ts

* Refactored SuggestionThreadObjectFac...

* Send alerts when e2e tests fail on develop

* Add failure notifications to lighthouse too

...

* Fix #13657: Fetch additional skill opportunities to fulfill page size as necessary (#13783)

...

* Don't set ALL topics

* default to first topic

* fix coverage

* Remove fdescribe

* ...

* Fix bugs

* readd calc

* last page removed case

* Add content hash for CSS (#15863)

...

* Update displayed value with null on deletion

* type fixes

Co-authored-by: Vojtěch Jelínek <[email protected]>
Co-authored-by: Sean Lip <sean@seanli...

* Adds diagnostic test model.

* Created Classroom model.

* Adds backend test into the shar...

* change padding in oppia-classroom-view-container, the search container was overlaps

* rever...

Github has started depreceating the Ubuntu 18.04 image for github actions, to avoid issues cause...

* service file name changed to backend-api

* backend api file added

* previous service fil...

* Initial implementation

* Fix tests

* fix tests

* Version 2

* fix lint

* nit

* temp

* finished

* written tests for the new function in exp_services

* temp

* temp...

* nits

* Testing selenium server

* testing given version

* Testing 20 times

* Testin...

* updated

* fix3

* nits

* done

* fixed ui issues raised by translation team

* fixed ui issues raised by translation team

...

* fix image context in question player; fix decoding of foreign chars in SVGs

* fix lint erro...

* added state_domain for support

* added draft_upgrade_service

* added feedback services
...

* add service and part of the tests

* add tests and register service

* add type

* add d...

* added voice_services

* added story_services

* added half question domain

* half test ...

* All changes done

* addressed comments

* merged

* Lint

* fix test

* lint

* Re...

* few changes

* updated

* removed single line

* updated

* done

* few more typeing...

* Replace protractor class names with e2e-class name

* Reverted unwanted changes

* Lint ch...

* added collection services

* added html_validation

* added opportunity services

* adde...

* service file name changed to backend-api

* backend api file added

* previous service fil...

* Adds diagnostic test model.

* Created Classroom model.

* Adds backend test into the shar...

* Fix part of #12912. Removing 'super-with-arguments' and fixing all files with errors on super(...

* More files done

* E2e try 1

* E2e try 2

* E2e try 2

* revert prev

* Question E2...

* fixed ui

* fixed ui

* changes

* changes

* changes

* addressed comments

* Update CHANGELOG

* Update AUTHORS

* Update CONTRIBUTORS

* Update core/feconf.py

* ...

* Revert "Revert "Milestone 1.5 (Migrate away from protractor): Migrated few test suite from pro...

Co-authored-by: saurabh <[email protected]>

* fix: text overlapping in navbar fixed

* fix: The expand/contract arrow was inaccessible due...

* Adding comment

* Minor Nit

* Addressing comments

* Minor nit

* Minor nit

* Try to fix blog page flake.

* trying to fix getDirection flake in state content editor

*...

* done

* done

* done

* add basic layout

* remove information card modal

* remote story-specific methods, backen...

* UI changes

* testing

* restructured code

* added navigation functions

* added nav
...