Js to ts migration

Fixes this issue:
PhantomJS 2.1.1 (Mac OS X 0.0.0) SingleStatCtrl showing last us time
instead of value should set formatted value FAILED
	expected '09/17/2017 4:56:37 pm' to equal '09/17/2017 16:56:37 pm'

Don't import JSON dashboards from hidden directories.

Merge branch 'feat-9671' of https://github.com/alexanderzobnin/grafana into alexanderzobnin-feat-9671

fix: return id from api when creating new annotation, fixes #9798

When creating a region annotation the response will include both
id (region start id) and endId (region end id), if not only id.

Datasources as configuration