Bug logged from this discussion: [https://discussions.unity.com/t/custom-searchprovider-doesnt-call-ondisable-when-window-is-closed/1568687/8]

 
* There are no clear repro steps unfortunately or I wasn't able to find the proper pattern.
* Ensure you have a SearchPRovider with an onEnable and onDisable functors and that those functors print something when they are triggered
* Open the search window see that onEnable is called. Closed the search window and see that onDisable is called.
* It seems that if you add queryblocks, remove frocus from the searchfield (or the window?) and close it, sometimes onDisable is not called.
* It seems it happens more often when you add a block and close the window.