Is there a one-click way to hide/unhide the Folders pane? Currently I have to click on the view menu -> layout -> Folders pane or use the mouse to resize the pane to hide and unhide the folders pane. If I'm checking my inbox, then I don't need to see my entire Folders tree which takes large amounts of space. If I can hide/unhide with a keyboard shortcut, or a toolbar button then it will be easier and more efficient. Thanks