Knowledge base search - improve search filter module

The search for the knowledge base should be like the other searches for tickets / changes / problems with multiple selects and "NOT contains" etc. options.

Should give the possibility to search for example:

- Contains X but not Y

- is category X

- author is X

- last editor is X

- Associated tickets / changes / problems / projects greater than X

- last edited less that MM/DD/YYYY

..