Update alerts dashboard

Get rid of options and filter panel. Display choosen fields in the
events list.
update "ALL" dashboard

Remove options and filter panel. Fix a typo.
Update DNS dashboard

get rid of option and filter panel. Display selected list of fields
in the event detail.
update 'FILE-Transactions' dashboard

No more options and filter panels. List of fields in detailed events.
update 'HTTP' dashboard

No more option and filter panels. Selected fields in the detailed
events. Typo fix.
Update 'HTTP-Extended-Custom' dashboard

No more Option and filter panels. Selected fields in the detailed
events.
Update 'SSH' dashboard

No more option and filter panels. Select fields in detailed events.
update 'TLS' dashboard

Get rid of option and filter panel. Select fields in detailed events.
update 'FLOW' dashboard

Suppress option and filter panel. Selected fields in detailed events.
But main thing is a change on the top historgram which is now displaying
the graph of new, established and closed flows.
Fix typos in 'FLOW' dashbord
Change theme of HTTP and TLS dashboards

Switch to dark theme so all dashboards use the same.
Merge pull request #2 from regit/master

Updating dashboards.