Merge branch 'mainwnd-no-mixin'
* mainwnd-no-mixin:
Remove DebuggerMainWndBase: debugger drivers.
Remove DebuggerMainWndBase: global options dialog.
Remove DebuggerMainWndBase: terminal window handling.
Remove DebuggerMainWndBase: saveSettings and restoreSettings.
Remove DebuggerMainWndBase: slotDebuggerStarting.
Remove DebuggerMainWndBase: myGetFileName.
Remove DebuggerMainWndBase: newStatusMsg.
Remove DebuggerMainWndBase: member variables used only in derived class.
Move class WatchWindow into a pair of own files.
Remove unused cruft from mainwndbase.*.