fixed addrow and widgetbuilder dialogs validation
added row edition functionality
fixed aggregation type rules for widget builder
added confirmations on widgets and rows deletion
fix dashboard deletion
Filter query is passed is now passed as JSON (straight in URL).  Only those filter criteria that can be easily modified, are shown (even is more complex filter is passed).  Done some basic testing.
Merge branch 'wip-json-filter-query'

Conflicts:
	src/js/modules/dashboard/views/stats.js