Feature Request: Remove the double window, add a window to show the predfined filters, allow multiple filters active at the same time

[linuxgurugamer]

1. I don't find the top window useful; all I want is a single window on the file, which I can apply filters to and it reflect immediatly
2. I'd like to see a small window showing all the predefined filters, to make it easier to click on a filter and see the results
3. Would be very useful to be able to apply multiple filters in a row; this would make it easier to drill down using simpler expressions rather than have to write a long complex expression. For example, I'd like to see all lines with the word "error", and then be able to add an additional filter to display additional lines which match something which I see in the first set of results.

These ideas come from another tool that I use, TextAnalysisTool.NET, it works well, but doesn't have the live tail which I am looking for