CORE-178 Reset result set before adding results.
CORE-178 Apply same fix for modal controller as for advanced search controller.
CORE-178 Two things: 1) made the improvement suggested by @Smotko, to disable the search button on click to prevent multiple successive clicks. 2) Doing this exposed the fact that both the modal and advanced search controllers were searching when either button was clicked because both search buttons were given the css selector of "objectReview". I fixed this by giving them different selectors. Now they work independently.
Merge pull request #1862 from reciprocity/feature/CORE-178

Search results now don't multiply result counts when search button is clicked multiple times.