When parsing tags, also keep track of the checkin uuid
Fixed key-value parsing
Prevent apply stash when nothing is selected
FossilOrigin-Name: 72ac541c4c28f83c94c371f2d81e116b8f3cf261
Added an "Apply" MessageBox button to handle the convert option asked by fossil
Converted Q_WS_* to Q_OS_* since the first no longer exists in QT5
FossilOrigin-Name: f99bd8ac7960cb1758222d2211937e99708f67f3
