* updates to citationviews to support all the functionality (add source etc.) provided by sourceview (including different tooltips for tree view and list view)
* moved registration of citationtreeview into view.grp.py
* removed citationtreeview.grp.py module
* fixed update to citation when note is deleted
* fixed update to citation when media object is deleted
* re-enabled edit button in sourcebackreflist
* improved date display in mergecitation
* changed default note type for citation notes
* changed backref in citation editor to CitationBackRefList
* fixed removal of citation handles from the list in primary objects when a citation is deleted
* fixes for pylint
svn: r18095
29cc4ee6e9