[*] minorChanges
[-] removed default destructor

[+] MultiScreenAbstract::findChangingWidget()

Merge branch 'features-3168' of https://gitlab.demlabs.net/cellframe/libdap-qt-ui into features-3332

Merge branch 'features-3269' of https://gitlab.demlabs.net/cellframe/libdap-qt-ui into features-3332

Merge branch 'features-3168' of https://gitlab.demlabs.net/cellframe/libdap-qt-ui into features-3168

# Conflicts:
#   controls/CustomPlacementButton.cpp
#   controls/CustomPlacementButton.h

Develop old

See merge request !17

lbl msg getter

See merge request !22

Features 3176

See merge request !19

[+] AdaptiveWidget::updateChildStyle(const QString &a_objName);
[+] CustomButtonComboBox;
[+] renamed CustomPlacementButtonDelegate => CustomButtonDelegate;
[+] CustomButtonDelegateFactory;
[+] CustomComboBox::setPopup();
[*] CustomComboBox
[*] CustomComboBoxPopup
[+] CustomPlacementButton::setProperty()
[+] Properties::SELECTED
[+] Utils::updateStyle(), setPropertyAndUpdateStyle()
[+] WidgetDelegateBase::setData(), setSelected(),  sizeChanged(), selected(), resizeEvent()
[+] WidgetDelegateFactoryBase::createWidgetDelegate()
[+] WidgetDelegateListView::delegateFactory(), setDelegateFactory(), indexWidget(), setModel(), rowsInserted(), dataChanged(), itemSelected(), createIndexDelegates()