REL-1301: Changing behaviour of OutlineNode tree for instrument filtering as per REL task comments.
REL-1301: Reverted changes for how the OutlineNodes behave for instrument filtering.
REL-1301: Reverted changes for the OutlineNodeRenderer.
REL-1301: Removed no longer necessary import and cleaned up.
Merge pull request #82 from sraaphorst/feature/REL-1301

Feature/rel 1301