it.boolean (BDD extension).

Shows a checkbox in for the spec in the sidebar.
Keyhandler check for instance of the Harness.
Get computed property helper.
Rename TH => LOCAL (internal API).
Rename TestHarness => UIHanress
UI-Harness margin.
Rename CSS ("th-" ==> "uih-").
Rename ctrl files (remove "th-" prefix).
Rename LOCAL => INTERNAL
Default margin.
Rename root control ("ui-harness")

{{> ctrl type='ui-harness' }}
Refactor folders
Unload method.
Keyboard navigation on index (cursor keys).
Run deep "before" hierarchy on first load.
Convert `tick`s to <code> in index.
Merge branch 'toggle'