Feature request - allow for exclude searches

[christofmuc]

Good idea! The "simple query" builder is already pretty complex given you have the modifiers at the top (all must match).

I am designing also for touch screen users, so if we use the right click it can be only as an additional feature that must be accessible also via left click. But the idea for "click and reset" sounds great, like you switch from Leads to Organ, and now always have to click Organ and then click Leads to deselect those, a right click on Organ could automatically cause the reset and restart the search. With touch screen, you have to still do the double click but you're faster anyway.

The exclude function sounds very powerful, but increases the complexity quite a bit, I'd split that out into a separate issue for a future more complex query!

Originally posted by @christofmuc in #401