Added ability to rotate and flip the brush when painting in tilemap.

[AGulev]

Now it's possible to flip and to rotate the brush when editing tile map using the following hotkeys:

• X - flip the brush horizontally
• Y - flip the brush vertically
• Z - rotate the brush 90° clockwise

Fix #3296

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• Code
  • Add engine and/or editor unit tests.
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There was a anomaly in the carbon chroniton propeller, introduced in version 8.10.2. This fix will make sure to reset the phaser collector on application startup.

Fixes #1234

### Technical changes
* Pay special attention to line 23 of phaser_collector.clj as it contains some interesting optimizations
* The propeller code was not taking into account a negative phase.

[matgis]

Looks great!

Just a few minor issues I'd like to see addressed, but overall this is a great addition to the editor, the code is readable and well-documented, and it's great to see it covered by tests as well!

Top marks! ❤️

[matgis]

reverse uses a general algorithm that creates a new, reversed list from any input sequence. It works, but is kind of inefficient. Since flipped-tiles is a vector, you can use rseq instead, which achieves the same result using a lightweight wrapper. It only works on "trivially reversible" sequences such as vectors, though.

[AGulev]

@matgis Thank you for your feedback! All the improvements were addressed.

[matgis]

Very nice! LGTM!