CT: filter based on "NOT" present

[zepumph]

From dev meeting today

I think that if the term starts with a !, then we say that it !includes().

[zepumph]

I got a temp solution working here, but it doesn't AND terms together correctly.

Working:
!migration will correctly ignore all tests/messages with "migration" in it

Not Working:
!migration -> will show all tests, since every test that has "migration" in it also has "->" in it.

@marlitas, please feel free to use the ! prefix with single words though! I'll get back to this when I can, but it will involve rewriting our filtering logic to remember a precedent for "I specifically told you not to include this thing".

[marlitas]

This is so amazing and cool. Thanks @zepumph!

[zepumph]

Ugg, I think I need to keep working on this, it doesn't work at filtering out content in the error message. I want to use this feature more than it currently supports. Reassigning.