Third and final Release Candidate

In this version:

• IR Build Aid improvements: now shows preset positions and indicates Positive direction via line color (from orange to greenish yellow)
• Fixed a bug when dragging and dropping a servo to the very end of the last group did not register as group change.
• Made an explicit button in flight editor to return to control window.
• Some other cosmetic changes.

Known Issue:

• Uncontrolled parts (docking washer) seem to freeze in flight mode when placed in Mirror Symmetry mode. Use Radial symmetry or place them separately to avoid this bug.

Reminder: parts are not packed, use the separate link in RC1 release or use alternative packs.