In the normal case, one can use Find In Files to search the Entire Solution and get results in either FIND RESULTS 1 or FIND RESULTS 2 output window. From there, one is supposed to be able to single click a line in the results output to pull up a quick (recyclable) preview window of the source. Double-click a line in the results output would open that file in a non-preview tab.
Though this usually works, both single and double-click in results window do not work for certain regular expressions. The find results are correct, just nothing happens when I either single or even double-click lines in the output. Non-working example shown below.