Reproducible crash with LevelEditor

[Mudbill]

I discovered a very simple and reproducible way to crash the LevelEditor. I figured I'd report this bug in case you guys want to fix it for some future update.

1. Place a "light" object in the level.
   
2. Open the color picker for that light (with RGBA floats).
   
3. Before clicking on anything in the color picker, hit a number on the keyboard (this will change the edit mode).
   
4. Change at least 1 value in the color picker.
   
5. Hit OK on the color picker. BlackBox.
   

Seems to conflict with saving the value to the light if the edit mode is not set to "Select" mode.

PS: A similar thing happens in HPL3 LevelEditor, but it doesn't crash. It simply fails to save the new light value.