show_ob_keybindings.py

The original show_ob_keybindings.py by Joe Bloggs can be found here on the Openbox website under "Openbox Configuration".

This version fixes some bugs, employs different design choices, and adds a few features:

• the user's home directory is now autodetected
• Labels are now unclickable separators instead of items
• shows groups of nested keybinds (chain key) as separate and indented blocks with their own header.