Implement a back stack for file browsing

[florensie]

Implement a back stack for file browsing

Feature description

When doing any sort of file browsing goldleaf should keep track of which directories the user has been in and in what order. This way if the user goes through a shortcut (if/when implemented #368) or starts from a path added with Quark the user doesn't go up a directory but back from where they came.

Benefits

This is how any modern file manager does it. Additionally, an up button (or .. directory) could be added for when going up a directory is actually desired (i.e. as with Windows Explorer). It's quite frustrating to have to press back a lot of times to go back to the main install menu when you opened a Quark path.

Additional information

Each time a directory is opened the path to it gets added to the to of the stack. When the user presses back the back button the top entry gets popped from the stack and navigated to. The up button would count as adding to the stack.