Merge pull request #467 from rashidkpc/navbar-control

Moved dash controller to navbar. Settings for it to dashboard settings.
Clarify error message.

Elasticsearch will throw a 404 if there is no indexes added yet, resulting in
this unclear message -- even for people that are not using any sort of proxy.

This message update should make it easier to quickly troubleshoot why the
the dialogue is popping up.
Merge pull request #469 from stephendotexe/update-404-error-message

Clarify error message.
Merge remote-tracking branch 'upstream/master'
fixed unlinted line
fixing indent issue
Merge remote-tracking branch 'upstream/master'
Closes #477, closes #464. Also fixes urlLink and noXml filters on array fields