Rebinding of default keys is not reflected in the Key Menu

Description of the problem or steps to reproduce

When rebinding default keys, the menu that shows with the ToggleKeyMenu action doesn't reflect the changes.

Steps to reproduce:

1. Change some default keybindings, e.g.:

{
    "Alt-z":    "Redo",
    "Ctrl-y":   "None",

    "Alt-?":    "ToggleHelp",
    "Ctrl-g":   "FindLiteral",
}

2. Launch micro. Observe that the bindings are in effect: Ctrl-y does nothing, while Alt-z performs redo. Ctrl-g starts a search, while Alt-? shows the help.

3. Hit Alt-g to show the key menu.

4. However, observe that the menu still shows ^Y Redo and ^G Help, which do not correspond to the bindings currently in effect.

Specifications

Version: 2.0.13
Commit hash: 68d88b57
OS: ChromeOS
Terminal: ChromeOS Terminal

Reproduce the issue in micro using the keybindings from the report, then trace the code that builds the menu shown by the ToggleKeyMenu action. Compare its displayed bindings with the active bindings after rebinding; done means the menu reflects the current assignments, including removed and reassigned defaults.