SettingsDialog: Add warnings when category or page to show is invalid
SettingsDialog: Add warnings when category or page to show is invalid

Change-Id: Ide7ef2eb1a9be9a363e5e062214a20da76d2064b
Reviewed-by: Tobias Hunger <012f8d714267bccc9d4766fbeace9f175fcc70c4@digia.com>

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