* Application: new createView() method

* Application: new createView() method

* gtk/qt3/qt4/GuiApplication: createView() method deleted

* LyXView:
 - init(): is now a pure virtual method. autoSave code transferred to constructor and updates to the frontends.
 - setGeometry(): new pure virtual method

* gtk/GView, qt3/QtView, qt4/GuiView: adapted to above change
 - setGeometry(): code transfered from GuiApplication

* lyx_main.C: call LyX::ref().addLyXView() in there instead of in Application::createView()

*

git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@15183 a592a061-630c-0410-9148-cb99ea01b6c8