Rework threshold

This MR introduces a slider to the comment settings. The threshold for visible comments is an optional feature that should be disabled by default. Furthermore, the user should be able to just remove the threshold feature. It also makes the comment setting dialog a bit cleaner for a non-experienced user.

!Closes #358 (closed) #357 (closed) #356 (closed)

Good concept! Please make it work.

added 1 commit

• cee4912c - Fix slide toggle inputs

Compare with previous version

mentioned in commit d5b727f5

merged

@tksl38 Still a little buggy: "-50" will not be stored, just "-45" works.