* src/DisplayState.py: Rename from DbState, kepp only DisplayState
class.
* src/GrampsDbBase.py: Add DbState class.
* src/MapView.py: Swap zoom_in and zoom_out to reflect reality;
add place list with the ScrollableWindow, request size for the
place list.
* src/ViewManager.py: Use DisplayState.DisplayState.
* src/gramps_main.py: Use GrampsDbBase.DbState; add docstring;
svn: r5055
status
* src/PageView.py: base class for pluggable views
* src/PersonView.py: new version of PeopleView
* src/ViewManager.py: view and database management class
svn: r5040