Merge branch 'filter-fade-fix' into 'master'

Removed fade when filtering results

## What does this MR do?

Removes the `opacity` change when filtering results seeing as we now do `Turbolinks.visit` it isn't required.

Best way to see issue - filter issues & then go back. Will still have opacity styling.

See merge request !4932

app/assets/javascripts/issuable.js.coffee

@@ -59,13 +59,12 @@ issuable_created = false
   filterResults: (form) =>
     formData = form.serialize()
 
-    $('.issues-holder, .merge-requests-holder').css('opacity', '0.5')
     formAction = form.attr('action')
     issuesUrl = formAction
     issuesUrl += ("#{if formAction.indexOf('?') < 0 then '?' else '&'}")
     issuesUrl += formData
 
-    Turbolinks.visit(issuesUrl);
+    Turbolinks.visit(issuesUrl)
 
   initChecks: ->
     @issuableBulkActions = $('.bulk-update').data('bulkActions')