Use QPointers when showing modal dialogs via exec()
Review Request #114234 - Created Dec. 1, 2013 and submitted
exec() for modal dialogs can make an application crashable. Krazy2 recommends to use QPointers to avoid such crashes: http://ebn.kde.org/krazy/reports/playground/office/kbibtex/index.html This patch tries to implement such QPointers.
KBibTeX compiles, installs and works as expected (not very extensive testing, but it seems so for a couple of days).