Add option to reassign file browser back button

Use the back button to navigate up in the directory tree. Requested by
Jason Gibson <jason@gibson99.com>.

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>
Address PMD warnings

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>
Comment out unused method

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>
Flush interface update before releasing module

This should prevent any races and crashes at end of replay.

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>
Fix module looping

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>