Made Treemodel interactive + made ScenarioList changable without reloading

...ugins/ScenarioManager/ScenarioManagerWidgetController.cpp

...narioManager/controller/ApplicationDatabaseController.cpp

...ins/ScenarioManager/controller/ScenarioListController.cpp

...ugins/ScenarioManager/controller/ScenarioListController.h

...plugins/ScenarioManager/controller/SettingsController.cpp

...ins/ScenarioManager/controller/openscenariocontroller.cpp

...-plugins/ScenarioManager/gui/applicationdatabasemodel.cpp

...ui-plugins/ScenarioManager/gui/applicationdatabasemodel.h

...Gui/gui-plugins/ScenarioManager/gui/openscenariomodel.cpp

...rXGui/gui-plugins/ScenarioManager/gui/openscenariomodel.h

...rmarXGui/gui-plugins/ScenarioManager/gui/scenarioitem.cpp

...XGui/gui-plugins/ScenarioManager/gui/scenariolistview.cpp

...marXGui/gui-plugins/ScenarioManager/gui/scenariomodel.cpp

...ArmarXGui/gui-plugins/ScenarioManager/gui/scenariomodel.h

...marXGui/gui-plugins/ScenarioManager/gui/settingsmodel.cpp

...ArmarXGui/gui-plugins/ScenarioManager/gui/settingsmodel.h

...ce/ArmarXGui/gui-plugins/ScenarioManager/gui/treeitem.cpp

source/ArmarXGui/gui-plugins/ScenarioManager/gui/treeitem.h

...e/ArmarXGui/gui-plugins/ScenarioManager/gui/treemodel.cpp

source/ArmarXGui/gui-plugins/ScenarioManager/gui/treemodel.h