[Feature] Focus "Filter Tags"

[dschaehi]

If I want to quickly filter the items by tags, I have to move my mouse to the tags pane and click on "Filter Tags" entry. This somehow interrupts my workflow.
It would be great if someone can write a script for focusing on "Filter Tags".

On a different note, for adding tags, there is this amazing script: #390 (comment)

[mjthoraval]

Please test: #575