when expanding a margin is added to both sides instead of just where the toolbar is located

I have my toolbar to the left of the screen, if I have it opened and visit any page the body has a margin left corresponding tothe width of the toolbar, that's ok, but if I collapse it and then expand it, the body gets both margin left and right.
This is a bug, I found that the code was wrong for example here:

if ($(toolbar).is('.nw') || $(toolbar).is('sw')) {

there's a missing "." right before 'sw' just as it is before 'nw'. I then noticed that that dot was missing for all 4 lines that correspond to vertical layout (opening and expanding) and for horizontal layout (opening and expanding).
I'm attaching a patch that fixes those 4 lines.