Error cancelling and starting search

[cnewtonne]

I'm able to reproduce the AV. It happens when 'start' button gets clicked several times before the previous search is finished.

Here's how ...

1. Initiate a non-fts search that takes time
2. In the search detail, search for string: *data*lake* nice
3. Click 'start' button several times quickly before previous search finishes. May be 10 times in succession.
4. After the 10th time, click to expand a menu item e.g. 'Tools' or 'Tree'
5. Repeat above steps till you get the AV error.

urd file used for this test: https://www.dropbox.com/s/0aff6wnthf...-viol.urd?dl=0

Screen recording: https://www.dropbox.com/s/gwbiqqk129...h%202.avi?dl=0