Added a dummy user to connect to Stalker to be able to pull task thumbnails.
Update: ``ExternalEnv.extension`` attribute is renamed to ``extensions`` to follow the naming conventions (and the type of attribute) in ``EnvironmentBase`` class.
New: Added "Open in Web Browser" context menu item for the tasks tree view in Version Creator UI.
Merge /home/eoyilmaz/Documents/development/anima/anima
Fix: Fixed "open in web browser" menu action in version_creator.tasks_treeView