#7338: Fix in trendline when comparing by year.

Trendline would fail to show "last yeear" events when there were no events in the corresponding period of the current year.
#7211: Add X-Requested-With header to all XHR requests. When an XHR fails with 401, post a message to the parent frame to trigger a page reload.
#7317: Use watch instead of watchCollection in the map directive to trigger the rendering end event even when the actual items don't change.
#7367: Change the HTTP interceptor to a named factory fixing injection errors in production.
#7331: Fix filter description ellipsis when resizing the window.
Merge branch 'master' into feature-trendline_percentage

Conflicts:
	app/scripts/models/charts_trendline.coffee
#7283 Cleanup of trendline model