[#2034] Encapsulate instances in separate panel

[#2033] Fix negative slider value in instance separation

[#2036] Fix incorrect position of parachute when auto radius

Useful later for using the file name as the rocket name

Set final release notes date

Final release notes

Redirect software updater download button to website

Shh, ignore the easter-eggs, you saw nothing.

Update thrust curves & parts database

(Shh, just kidding, this is just so this commit can get past our rigorous code-check)

Base Drag Hack Example

[#2001] Add document save change on sim edit

Update Dutch translations

Fix some issues in software updater

[#2009] When canceling a component change, check for an unmodified component earlier on

Bump release version to 22.02

Otherwise unit tests fail

[#1999] Add checkbox to show/hide warnings

Updated and saved flight simulations so that the flight simulations do not run when the tab is s...

Cleaned up some text.

Adds the "Base drag hack (short-wide)" example.

[#2002] Restore plugged

Update thrust curves & parts database

Prep OR for 22.02 release candidate 1

RC1 release notes

Enable decal editing in Linux

Filter decal file chooser on images + don't show edit decal button if not possible

# Conflicts:
# swing/src/net/sf/openrocket/gui/configdialog/AppearancePanel.java

Bad description of the commit, but I'm tired

Check for gaps and overlaps in airframe

Grey out texture edit button if using default material

Warn for phantom tubes earlier on