D25484: Enable closing a tab by middle click

[Bob Bai]

bdbai created this revision.
bdbai added a reviewer: VDG.
Herald added a project: Okular.
Herald added a subscriber: okular-devel.
bdbai requested review of this revision.

REVISION SUMMARY
  In some applications like Chromium or Dolphin, it is possible to use middle click to close a tab. This patch brings the similar user experience to Okular.

REPOSITORY
  R223 Okular

REVISION DETAIL
  https://phabricator.kde.org/D25484

AFFECTED FILES
  shell/shell.cpp

To: bdbai, #vdg
Cc: okular-devel, johnzh, andisa, siddharthmanthan, maguirre, fbampaloukas, joaonetto, kezik, tfella, ngraham, darcyshen, aacid
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