There is no need to do this in isSelectedDockWidgetInfoArea, as it can be checked in constant O(1) time.
This method was occupying a significant proportion of the CPU time of swift.
Even though QTabBar's property usesScrollButtons is set to true in Qt
Designer, it is not set explicitly in generated C++ code. The default
value is style dependent, which caused the scroll buttons to be visibile
everywhere except Mac OS/X.
refs #683
* 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
* Allow to "jump" to text message channel from ATC / aircraft
* changed timer connections for components to new SLOT syntax
* housekeeping:
** new function in network context for station by callsign
** refactored textmessage component, allow to select tab by slot
** wired up signal / slots in main GUI
** removed unused functions
** allow to select area and "myself" in infoarea
* 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)
* allow nested info areas
* added cockpit info area
* fixed several finder methods to excluded nested info areas from child elements
* using QScopedPointer for ui
* placeholder GUI components for new cockpit
