pc-updategui: Main window QMainWindow now but not QDialog. Main menu added
pc-updategui: Patchset selection dialog (ported from Update Center). Feature #5874. Menu item enable / disable logic should be checked
Merge remote-tracking branch 'upstream/master' into pc-updategui
UpdateGUI: Added dialog with system update descriptions. Ported from Update Center. Feature #5875
PC-updategui: Fig main window UI
Merge pull request #50 from yurkis/pc-updategui

PC updategui: two new dialogs