Zotero pane min-height remains in effect when pane is closed

[dstillman]

If the tag selector was expanded and the Zotero pane is closed, resizing Firefox smaller than the min-height will cause the status bar to disappear.

​http://forums.zotero.org/discussion/287/?Focus=1228#Comment_1228

[dstillman]

(In [1126]) Fixes #515, Zotero pane min-height remains in effect when pane is closed

Also:

• Changed default Zotero pane min-height to 32px, which lets you shrink it to just the controls -- it would be better if we had a notification popup for the various non-translator save functions, since this way there's no feedback when you click the buttons, but at least it's possible. A dedicated mode with a keyboard shortcut would probably be better.
• Fixed bug (I think) whereby resizing the Z pane downward after resizing the tag selector up and then down sometimes caused the Z pane to stay at a fixed size and get pushed below the bottom