[oozie] Basic structure for getting the parents of columns, rows and widgets
[oozie] Get widget predecessor
[oozie] Add set_link() and get_link() to a Node
[oozie] Better delete logic for widgets
[oozie] Generate random ids for the action sections
[oozie] Removed isNested reference from template and other dashboards
[oozie] Support sequential actions
[oozie] Initial support for fork and join and fixed predecessor
[oozie] Support creating a fork
[oozie] Delete a widget can delete forks and joins too
[oozie] Start, end, fork and join nodes cannot be manually removed
[oozie] Link fork and Join nodes to their widgets
[oozie] Delete a single action node
[oozie] Remove a node below a regular action
[oozie] Lateral drop targets are minimized in non editing mode