D21287: Try to find always an unique visible document name without a number suffix

[loh tar]

loh.tar edited the test plan for this revision.

REPOSITORY
  R39 KTextEditor

REVISION DETAIL
  https://phabricator.kde.org/D21287

To: loh.tar, #ktexteditor
Cc: dhaumann, cullmann, kwrite-devel, kde-frameworks-devel, #ktexteditor, 
domson, michaelh, ngraham, bruns, demsking, sars