* move hotkey settings in own GUI component -> easier adjustments
* some fixes for dock widgets when tab widget is shown without names (unrelated but found + fixed in same step)
* Added extra QFrame in CDockWidgets to have better control in stylesheez (CDockWidget -> QWidget -> QFrame)
* Adjusted stylesheets
* Force update of stylesheet when frameless changes
* Cascading status message in nested CInfoArea components
Floating frameless dock widget still not transparent
* different dyn. property names for main window, dock window and infoarea
* dyn.properties for nested QWidgets
* style sheet for navigator
* utility function to delete layout
* added standard OS icons, some formatting in CICons
* actions in main window to be used in navigator
* main window becomes normal window when minimized so it is correctly displayed in Win taskbar
Remark: Frameless floating dockwidgets with rounded borders not yet working
* allow to set/unset frameless mode in CDockWidget
* adjusted context menus
* adjusted style sheets
* ini settings for margins
* hidden info area to host floating widgets only visible when floating (allows to CDockInfoArea widgets)
* made some private slots non-virtual
* renamed to toggleFloatingWholeInfoArea() for whole info area (in contrast to toggleInfoArea for individual areas)
* signal for changedWholeInfoAreaFloating (allows the main GUI to hide this area if empty)
* add. flag to understand m_resetedFloating
* prepared for frameless dock widget (not yet implemented)
Existing functions visible() / isHidden() are not suitable, as those represent "technical visibility".
We need a logical visibility telling us if the user can see / has selected the corresponing dockable widget.
* New base class info area (where dockable widgets are placed)
* Adjusted derived component (currently 1)
* Cleaned up old code in floatAllWidgets
