* Add icon for citations view
* disable old sourceview
* change citationtreeview to be Sources navigation view
* citationlistview is now the Citations view
* merge libcitationview into citationlistview and citationtreeview, and corrected and rationalised
* remove libcitationview
* corrected initialisation of source_handle in Citation.py
* fixes for preventing same source being edited twice
- fixed blockedtext in citationembededlist
- override build_window_key in editcitation.py
svn: r18211