refs 419, improved pilot client navigator

* added setting and allow to restore/save state
* allow to set margins
* fixed style sheet
* moved margin function to utility

src/blackmisc/propertyindex.h

@@ -107,6 +107,7 @@ namespace BlackMisc
             GlobalIndexCGuiStateDbOwnModelsComponent    = 14000,
             GlobalIndexCGuiStateDbOwnModelSetComponent  = 14100,
             GlobalIndexCSettingsDockWidget              = 14200,
+            GlobalIndexCSettingsNavigator               = 14300,
             GlobalIndexAbuseMode                        = 20000  // property index abused as map key or otherwise, to be removed if no longer needed
         };