Beta-ish version I have hacked together . I don't really know how to add a button to the window in a reliable way so I just made it work with a script menu entry.
Tested on WLM 8.5, and apparently works on 8.1 as well (according to Plik ).
For anyone who knows how to add a button for show/hide, feel free to use this script for the resizing part if you want.
Updates:
v1.0.001: Changed height for WLM 8.1, and general optimisation.
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. I don't really know how to add a button to the window in a reliable way so I just made it work with a script menu entry.
Attachment: 
