Crash when clearing palette while viewing color
If you navigate to the color picker in Sketch, have a color selected, and then clear the palette, it causes Sketch to crash.

Exception Type:  SIGABRT
Exception Codes: #0 at 0x7fff84a6bf06
Crashed Thread:  0

Application Specific Information:
**\* Terminating app due to uncaught exception 'NSRangeException', reason: '**\* -[__NSArray0 objectAtIndex:]: index 0 beyond bounds for empty NSArray'
