D14773: completion widget: fix minimum header section size

[Sven Brauch]

brauch created this revision.
brauch added a reviewer: Kate.
Restricted Application added projects: Kate, Frameworks.
Restricted Application added subscribers: kde-frameworks-devel, kwrite-devel.
brauch requested review of this revision.

REVISION SUMMARY
  The header is hidden, but if the minimum size is -1 (the default), Qt
  chooses something non-zero as the minimum size. The completion widget
  then sets it to something, assumes it has that width, and messes up
  its layout when it actually ends up being larger than that.

REPOSITORY
  R39 KTextEditor

REVISION DETAIL
  https://phabricator.kde.org/D14773

AFFECTED FILES
  src/completion/expandingtree/expandingtree.cpp

To: brauch, #kate
Cc: kwrite-devel, kde-frameworks-devel, michaelh, kevinapavew, ngraham, bruns, demsking, cullmann, sars, dhaumann
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