Avoid overall refresh in DAM UI when selecting a filter

Each time a click is done in DAM UI, at least 3 queries are run to refresh the UI:

• one to rerender import sets => should not, except if a set is being selected
• one to rerender import folders => should not, except if a folder was selected
• one to rerender the results table => OK if a filter is selected, but NOT OK when opening the modal popup to select an import folder

=> This behaviour can have a very bad impact on performances