Suggestion: The ability to remove certain results in server/DM search box.

Right now, when searching you have the ability to slim down your results via formatting.
ie: "From:user" (Only shows messages from that user) "in:channel" (only shows messages from that channel)

My suggestion would be to add a [not] that can be placed before that. Here's how it would work:

If someone searched "from:Gorgram, in:general [not]has:image", the search function would give results from Gorgram in #general, but remove all the results that have an image in them. This would make searching for specific things a lot easier.