REQUEST: allow the user to Import ALL dashboards from a Model.

Either a single button that does this or let us use checkboxes to select multiple Classic dashboards at the same time.

I would also suggest that we support importing of Content Sections as Categories and auto-categorize dashboards based on these Content settings.  I could see that this might only work well if we supported mass conversion of all dashboards at once and the user selected it.  There could be an option that asks if the user would like to auto-categorize.