Fixes: flicker on repaint - rendering menu labels

Don't know if it's just coincidence but setting translateZ on the
scroll-target class fixes all that flickering that eventually appears

The theme didn't account the new rendering menu within the drawer
fixes: oops wrong place for that label
removes: duplicated code

same code is just above it
Merge pull request #65 from alpadev/master

Fixes: flicker on repaint - rendering menu labels