D7162: KSqueezedTextLabel: Add isSqueezed() for convenience

[Henrik F .]

rkflx marked an inline comment as done.

REPOSITORY
  R236 KWidgetsAddons

BRANCH
  arcpatch-D7162

REVISION DETAIL
  https://phabricator.kde.org/D7162

To: rkflx, #frameworks, dhaumann
Cc: dhaumann