D14663: Give the "invalid directory name" dialog a cancel button

[Nathaniel Graham]

ngraham created this revision.
ngraham added reviewers: VDG, Frameworks.
Restricted Application added a project: Frameworks.
Restricted Application added a subscriber: kde-frameworks-devel.
ngraham requested review of this revision.

REVISION SUMMARY
  Adds a cancel button to the "Invalid Directory Name" dialog.

TEST PLAN
  - Try to create a new folder named "." or "..
  - In the resulting dialog, click Enter a DIfferent Name -> you are prompted to choose a new name
  - Enter "." or ".." again
  - In the resulting dialog, click Cancel -> dialog disappears
  - Do the above, but enter a valid name when prompted -> the folder is created using the valid name

REPOSITORY
  R241 KIO

BRANCH
  master

REVISION DETAIL
  https://phabricator.kde.org/D14663

AFFECTED FILES
  src/filewidgets/knewfilemenu.cpp

To: ngraham, #vdg, #frameworks
Cc: kde-frameworks-devel, michaelh, ngraham, bruns
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