Can move a dash from a folder back to root level as well

Dashboard folders included in all searches. If a dashboard matches
a search and has a parent folder then the parent folder is appended
to the search result. A hierarchy is then returned in the result
with child dashboards under their parent folders.

The guardian class checks if the user is allowed to get the
permissions for a dashboard.

If browsing, then show open folder icon. If searching, show
the closed folder icon

SQL Integration Tests for the guardian class too.

Removes restricted dashboards from search result.

Breaks some stuff like selected dash in the search result.
In dashboard search, if the user is not searching then the result is
returned as a tree structure. No ACL's or user group ux yet.

Explains that you need to clone the grafana repo if you have not done that already.

When table data returns a column with the value 0, it should not ignore
it. This change checks for undefined instead of if the value is truthy.

Fixes #8531