- added a button to scan the server for installed containers
- added a check on the presence of installed containers before configuring the server, if the containers are already installed, then we will add them to the GUI
- added new control element - PopupWarning.qml
* used a Qt6 ported version of SortFilterProxyModel
* used an updated Qt6 compatible version of QXZing
* added a flag to windows linker to avoid WinMain problem of MSVCRTD
* renamed utils.cpp to utilities.cpp for avoiding confusion with the same file name in SortFilterProxyModel