I find that I am often adding multiple Test as Steps in a test case. I also have to perform  searches within the Add Test as Step window to find the test cases I need. CTRL+clicking results in unselected items after a search, so I am forced to reopen that window multiple times. 

It would be nice if there were checkboxes next to all rows in the Add Test as Step window so as to make multi-selecting easier....or any other means of supporting an explicit multi-select function in that window.