QmlDesigner: Don't close sidebars
QmlDesigner: Don't close sidebars

You cannot reopen them.

Change-Id: I83e63fb7628b933e82f6a690cbe3de97cf57f3c3
Reviewed-by: Tim Jenssen <6a21f175c697b4129e1bafb6e9b52078bb1a6738@digia.com>

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