Cube is incorrectly sized after rotation on iPad

[chucks]

Describe the bug
If you rotate the iPad while playing isowords, the cube will not be sized the same as if the game was launched in that orientation.

To reproduce

• Launch isowords in landscape on iPad or the simulator

• start a new game

• rotate to portrait

• Launch isowords in portrait on iPad on the simulator

• start a new game

• rotate to landscape

Expected behavior
The cube would be shown without clipping and at the same size as if the app was launched in the given orientation.

Screenshots/video

Environment

• iPad running iOS 14.7.1

Additional context
Similar issues exist if you switch the iPad from full screen into side-by-side multitasking, but there are additional issues with the multitasking UI not covered by this problem. I'll log a separate issue for these.

[stephencelis]

Just merged your fix, thanks!