* Makes the toggle_hidden keybinding configurable via mappings
* Adds new mini.files keybindings for opening files in a vertical split,
with both go_in and go_in_plus modes (configurable via mappings)
* Adds new keybinding to change working directory from mini.files
(configurable via mappings)
Closes#2692
If you press `g` in a mini.files menu, the `.` key shows up but doesn't have a description. This adds a desc attribute to the binding so the menu shows a correct description.