Comment by joveian

I just checked (the desktop version) and right clicking and using "search messages" also does not use the global index and does not do stemming. It is sieve, which has issues (no way to search based on DMARC authenticated exact email address, which is something basic that email search should really provide) but does cover a lot of search. You can save common searches as folders, though frustratingly "search messages" does not appear on those saved searches; it would be quite convenient if it did and started a search pre-filling the saved settings. I had actually forgotten that the global search exists so I turned it off (at the bottom of general settings).