Move datasource view to taxeditor.webapp
As the datasource view is only needed for local mgd. it can be moved to taxeditor.webapp
This way maybe the datasource dependencies can be used from taxeditor.webapp too and can be removed in taxeditor.cdmlib.
Also when handling taxeditor.webapp as loadable plugin these dependencies are not needed at all anymore.
This also includes the dialogues opened within the datasource view.
Problems need to be solved:
after moving all datasource/managed server related classes results in problems concerning the login dialog because it uses these classes.
Therefore we need another login dialog containing the managed server in webapp which is used when the webapp plugin is loaded.