[3.5.0-rc7] M291 Selection tiles not displayed consistantly

[wschadow]

The tile for selection are not displayed consistantly. M291 S3 is displayed as

M291 S4 has a shadow effect in the light theme:

[chrishamm]

@wschadow Thanks, I'll remove the button elevation in the next 3.5 build.

[oliof]

I'd really prefer less flatness in the UI .... buttons should be visually different from text labels.