no issue
- the upcoming Module Unification re-organisation in Ember will no longer support nested components
- this PR pre-emptively moves our usage of nested components into a flat file structure
no issue
- modify behaviour of selectize's `openOnFocus` option by ensuring that the dropdown is not opened when the input field is blank
- fixes issue with dropdown opening when content is loaded async despite `openOnFocus=false`
- fixes issue with dropdown remaining open when user enters text then deletes it
refs #5343, #5652
- implements basic post and user search using selectize input
- queries minimal API endpoint and refreshes results on search input focus if results are older than 60 seconds