But Apex has similar functionality now: navigate to download queue, select all items, right click and select "Search for Alternatives". As a result it opens new search tabs for each row. The same logic I suggest for search by names from notepad.
Besides, absence of a such feature doesn't stop users from opening many search tabs. Right now I open 60 tabs, enter file names, run searches and (taking into account that in my local hub search interval is 30sec) I go for a tea(untill all searches will be finished and I can look through the search results). So as I understand the load on a server is the same (as with automatic search feature), but right now I need to spend additional 10-15 minutes to enter all file names manually.