This reverts commit d457edb9.

Features were previously assumed to only be in one group, but with the addition of quick filtering functionality in 4.43.0 features can now end up in multiple groups. This change fixes problems with determining the visibility of features that are in multiple groups.

This only seems reproducible on mac. The problem is most obvious with a wide sequence because the inaccuracy is cumulative from left to right.

There is still a problem with certain font sizes. As you increment the font size it goes 8(ok) -9-10-11-12- 12(ok) -13-14-15-16- 16(ok)
so it is only accurate for sizes 8, 12, 16 etc.