a pic says more than 1000 words.
i show 4 points for fixes/ options.http://i40.tinypic.com/v7tcf9.jpg
i hope it´s possible.
reason for the changes: just one sidebar is open and show a lot infos. more space for library browser.
player control panel isn´t important to me, but i saw that it can be integrated in now playing top/botton, so the left bar could complete the selectable options (i forgot, player control panel can also be shown on the top under menu line
edit i saw, that "artwork" could be handled with mouse to adjust the size. that´s okay, but still an option to do not display would be fine