Added new info widget for workflow Task
Added task widget and new tooltip view for tasks
Added missing tree.mustache for Task extension
Merge remote-tracking branch 'origin/develop' into workflow-task-widget

Conflicts:
	src/ggrc_workflows/assets/assets.yaml
	src/ggrc_workflows/assets/mustache/tasks/tree.mustache
Move Task-page initialization into `apps/workflows.js`

* Also don't show Task widget on non-Workflow pages
Remove `console.log`
Fix errant mapping definition [story:72952364]
Miscellaneous fixups for Workflows

* Remove invalid `Task.subtasks` mapping
* Remove canonical mappings from most objects to Workflow and TaskGroup
* Move `ObjectNav.Actions` hook to apply only to Workflow page
* Add `context` and `owners` attributes in Workflow models, where
  applicable
Remove `apps/tasks.js`, since it's no longer referenced
Merge pull request #1418 from reciprocity/workflow-task-widget

Workflow task widget