Inverse filters not working when another filter is active

[cmbaker82]

Current behaviour

Inverse filters are not working as expected. For example if you have a lines that contains the words two and three, and you want to only display ones with Three and not Two

Expected behaviour

When an inverse filter is matched that line should not be displayed

Steps to reproduce the problem

Open log file
Add filter for a key word
Add a second filter for a keyword you do not want displayed and select the not equal button