Mode
A mode contains the following information:
name
Type: string
This is the name of the mode visible in the help menu.
help
Type: nullable string
If specified, the help menu will display this instead of the auto generated mappings.
extra_help
Type: nullable string
If specified, the help menu will display this along-side the auto generated help menu.
key_bindings
Type: Key Bindings
The key bindings available in that mode.
layout
Type: nullable Layout
If specified, this layout will be used to render the UI.
prompt
Type: nullable string
If set, this prompt will be displayed in the input buffer when in this mode.