DiffEditor: Fix double click inside commit editor
DiffEditor: Fix double click inside commit editor

The bug was that if you double-click a file
in the commit editor, then double-click another one,
the diff remains with the first one.

Change-Id: I1f49b549c9dfd3ebd4ec6950ed28dd8cbc7d0227
Reviewed-by: Orgad Shaneh <2b010cbad792a0c0a8175f752f93f83941fc6bc1@gmail.com>

kuba1/qtcreator,maui-packages/qt-creator,kuba1/qtcreator,martyone/sailfish-qtcreator,maui-packages/qt-creator,maui-packages/qt-creator,danimo/qt-creator,martyone/sailfish-qtcreator,martyone/sailfish-qtcreator,xianian/qt-creator,xianian/qt-creator,xianian/qt-creator,danimo/qt-creator,kuba1/qtcreator,martyone/sailfish-qtcreator,maui-packages/qt-creator,Distrotech/qtcreator,kuba1/qtcreator,kuba1/qtcreator,martyone/sailfish-qtcreator,xianian/qt-creator,martyone/sailfish-qtcreator,AltarBeastiful/qt-creator,amyvmiwei/qt-creator,martyone/sailfish-qtcreator,amyvmiwei/qt-creator,kuba1/qtcreator,AltarBeastiful/qt-creator,kuba1/qtcreator,danimo/qt-creator,amyvmiwei/qt-creator,Distrotech/qtcreator,xianian/qt-creator,farseerri/git_code,amyvmiwei/qt-creator,danimo/qt-creator,farseerri/git_code,Distrotech/qtcreator,farseerri/git_code,kuba1/qtcreator,Distrotech/qtcreator,danimo/qt-creator,Distrotech/qtcreator,farseerri/git_code,AltarBeastiful/qt-creator,danimo/qt-creator,danimo/qt-creator,AltarBeastiful/qt-creator,farseerri/git_code,xianian/qt-creator,Distrotech/qtcreator,danimo/qt-creator,martyone/sailfish-qtcreator,amyvmiwei/qt-creator,farseerri/git_code,amyvmiwei/qt-creator,danimo/qt-creator,Distrotech/qtcreator,maui-packages/qt-creator,AltarBeastiful/qt-creator,martyone/sailfish-qtcreator,AltarBeastiful/qt-creator,farseerri/git_code,maui-packages/qt-creator,xianian/qt-creator,amyvmiwei/qt-creator,farseerri/git_code,AltarBeastiful/qt-creator,maui-packages/qt-creator,kuba1/qtcreator,amyvmiwei/qt-creator,xianian/qt-creator,xianian/qt-creator,AltarBeastiful/qt-creator