Update #32 - undo/redo with mouse, resolution related fixes for Linux

Features

• Back/Forward (M4/M5) buttons on mouse will now undo/redo moves.

Bugfixes

• Removed resolutions with non native aspect ratio (resolutions with black bars on sides/top). When game was running on one of them, mouse position was not matching what was calculated and processed by Unity UI system.

• Fixed issue where switching from windowed mode to full screen would allow game to run on unsupported resolution.