Disabled commit/rollback buttons are activated when entered Menu - cause Tora crash later

[mkyral]

1. Start Tora - commit/rollback buttons are disabled
   

2. Open the File menu - Commit and rollback buttons are enabled now
   

3. Close menu and click on commit or rollback button - Tora will crash

Application: tora (tora), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fb99d573780 (LWP 22331))]

Thread 1 (Thread 0x7fb99d573780 (LWP 22331)):
[KCrash Handler]
#7  0x00005629910fd93b in toWorksheet::commitChanges (this=0x5629948ba7d0) at /usr/include/qt5/QtCore/qsharedpointer_impl.h:311
#8  0x0000562990cfc942 in toMain::commandCallback(QAction*) () at /var/tmp/portage/dev-db/tora-9999/work/tora-9999/src/main/tomain.cpp:592
#9  0x0000562990bc97bc in toMain::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) () at /var/tmp/portage/dev-db/tora-9999/work/tora-9999_build/src/main/moc_tomain.cpp:200
#10 0x00007fb9a55b690d in QMetaObject::activate(QObject*, int, int, void**) () at kernel/qobject.cpp:3795
#11 0x00007fb9a55b6cd7 in QMetaObject::activate (sender=sender@entry=0x5629940abab0, m=m@entry=0x7fb9a6c4e820 <QMenu::staticMetaObject>, local_signal_index=local_signal_index@entry=2, argv=argv@entry=0x7ffeb9ce6c90) at kernel/qobject.cpp:3648
#12 0x00007fb9a689af82 in QMenu::triggered (this=this@entry=0x5629940abab0, _t1=<optimized out>) at .moc/moc_qmenu.cpp:285
#13 0x00007fb9a68a17fc in QMenuPrivate::_q_actionTriggered() () at widgets/qmenu.cpp:1456
#14 0x00007fb9a68a7daa in QMenu::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) () at widgets/qmenu.h:65
#15 0x00007fb9a55b690d in QMetaObject::activate(QObject*, int, int, void**) () at kernel/qobject.cpp:3795
#16 0x00007fb9a55b6cd7 in QMetaObject::activate (sender=sender@entry=0x5629941d75f0, m=m@entry=0x7fb9a6c414a0 <QAction::staticMetaObject>, local_signal_index=local_signal_index@entry=1, argv=argv@entry=0x7ffeb9ce6e50) at kernel/qobject.cpp:3648
#17 0x00007fb9a6716652 in QAction::triggered (this=this@entry=0x5629941d75f0, _t1=<optimized out>) at .moc/moc_qaction.cpp:383
#18 0x00007fb9a67191c8 in QAction::activate(QAction::ActionEvent) () at kernel/qaction.cpp:1166
#19 0x00007fb9a68122cd in QAbstractButtonPrivate::click() () at widgets/qabstractbutton.cpp:397
#20 0x00007fb9a6812515 in QAbstractButton::mouseReleaseEvent (this=0x562994192850, e=0x7ffeb9ce73d0) at widgets/qabstractbutton.cpp:1011
#21 0x00007fb9a690709a in QToolButton::mouseReleaseEvent (this=<optimized out>, e=<optimized out>) at widgets/qtoolbutton.cpp:622
#22 0x00007fb9a6761d38 in QWidget::event(QEvent*) () at kernel/qwidget.cpp:8960
#23 0x00007fb9a6907143 in QToolButton::event (this=0x562994192850, event=0x7ffeb9ce73d0) at widgets/qtoolbutton.cpp:1001
#24 0x00007fb9a671da51 in QApplicationPrivate::notify_helper (this=this@entry=0x562993da8d30, receiver=receiver@entry=0x562994192850, e=e@entry=0x7ffeb9ce73d0) at kernel/qapplication.cpp:3736
#25 0x00007fb9a67250df in QApplication::notify(QObject*, QEvent*) () at kernel/qapplication.cpp:3197
#26 0x00007fb9a558af11 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at kernel/qcoreapplication.cpp:1060
#27 0x00007fb9a558b1ae in QCoreApplication::sendSpontaneousEvent (receiver=receiver@entry=0x562994192850, event=event@entry=0x7ffeb9ce73d0) at kernel/qcoreapplication.cpp:1462
#28 0x00007fb9a6724366 in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&, bool, bool) () at kernel/qapplication.cpp:2683
#29 0x00007fb9a677cdd6 in QWidgetWindow::handleMouseEvent(QMouseEvent*) () at /usr/lib/gcc/x86_64-pc-linux-gnu/8.2.0/include/g++-v8/bits/atomic_base.h:390
#30 0x00007fb9a677fea0 in QWidgetWindow::event (this=0x56299426e910, event=0x7ffeb9ce7840) at kernel/qwidgetwindow.cpp:281
#31 0x00007fb9a671da51 in QApplicationPrivate::notify_helper (this=this@entry=0x562993da8d30, receiver=receiver@entry=0x56299426e910, e=e@entry=0x7ffeb9ce7840) at kernel/qapplication.cpp:3736
#32 0x00007fb9a6724e90 in QApplication::notify(QObject*, QEvent*) () at kernel/qapplication.cpp:3483
#33 0x00007fb9a558af11 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at kernel/qcoreapplication.cpp:1060
#34 0x00007fb9a558b1ae in QCoreApplication::sendSpontaneousEvent (receiver=receiver@entry=0x56299426e910, event=event@entry=0x7ffeb9ce7840) at kernel/qcoreapplication.cpp:1462
#35 0x00007fb9a598599d in QGuiApplicationPrivate::processMouseEvent (e=0x562994b09cd0) at kernel/qguiapplication.cpp:2102
#36 0x00007fb9a5986dd5 in QGuiApplicationPrivate::processWindowSystemEvent (e=e@entry=0x562994b09cd0) at kernel/qguiapplication.cpp:1837
#37 0x00007fb9a596117a in QWindowSystemInterface::sendWindowSystemEvents (flags=flags@entry=...) at kernel/qwindowsysteminterface.cpp:1151
#38 0x00007fb99cd4048a in xcbSourceDispatch (source=<optimized out>) at qxcbeventdispatcher.cpp:105
#39 0x00007fb9a325e827 in g_main_context_dispatch () from /usr/lib64/libglib-2.0.so.0
#40 0x00007fb9a325ea60 in g_main_context_iterate.isra () from /usr/lib64/libglib-2.0.so.0
#41 0x00007fb9a325eaec in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#42 0x00007fb9a55e2433 in QEventDispatcherGlib::processEvents (this=0x562993e253e0, flags=...) at kernel/qeventdispatcher_glib.cpp:422
#43 0x00007fb9a558994b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at ../../include/QtCore/../../src/corelib/global/qflags.h:140
#44 0x00007fb9a5592192 in QCoreApplication::exec() () at ../../include/QtCore/../../src/corelib/global/qflags.h:120
#45 0x0000562990b9326f in main () at /usr/include/qt5/QtCore/qcoreapplication.h:116
#46 0x00007fb9a4e05ecb in __libc_start_main () from /lib64/libc.so.6
#47 0x0000562990bb097a in _start () at /var/tmp/portage/dev-db/tora-9999/work/tora-9999/src/main/main.cpp:345

Expected result: Commit/rollback button stays disabled

Tora compiled from latest git sources.