Increased autocomplete timer to 1 second.
The file browser is now collapsible.

PLSplitViewController implements the two collapsing delegate methods, allowing only the file browser to be collapsed.

Simplified how the controller manages resizing by removing the implementation of splitVIew:resizeSubviewsWithOldSize: and instead implementing splitView:shouldAdjustSizeOfSubview: that returns YES for the file browser only if breaking the width bounds.