Add workflow_state computable property to business objects
Color-trees for all workflow objects
Add computed workflow states to workflow
Ensure proper state coloring for 2nd tier lists
Merge branch 'develop' into feature/workflow-object-states

Conflicts:
	src/ggrc/assets/mustache/directives/tree.mustache
Merge pull request #1534 from reciprocity/feature/workflow-object-states

b/15598720 Color coding of all related objects in trees