When executing a query with the solr query tool (in _admin), the wait message freeze all the interface where it should only block the tool.

This issue intend to change this behaviour to only display the loading mask on the result pane, allowing the user to edit the query during executiof if needed and start a new execution.
Only the result of the last execution will be displayed. If a new execution is requested before the result of the previous are available, the previous result are simply ignored