Fix the problem of a toolbar being hidden if adding/removing actions on another toolbar. Just have to disable temporarily the auto save setting of the main window while we
regenerate the interface. It happens that in the case that auto save is enabled, the main window is listening to appearance changes. After removing and readding all the
containers of the window, KToolBar::loadState() was being called (on createContainer()), which was triggering a save on the rc file of the app, saving the settings that
XMLGUI has just set, and overriding the real user set ones. This disables this temporarily, and sets auto save again back when the rebuild has finished.

BUG: 105525
BUG: 170150
CCBUG: 171186

svn path=/trunk/KDE/kdelibs/; revision=871100