Binding keys UI is unfriendly

Description

This appears to be the proper place, but let me know if it belongs elsewhere.

User is expected to divine the proper incantation to unbind a hotkey through their closeness with god (or something).

User is able to bind multiple keys to conflicting actions.

Expected behavior

The UI for any page where a user binds keys should inform the user of how to unbind keys.

Attempting to bind a key to multiple actions within the same menu should unbind the key from other actions in the same menu.

Actual behavior

The user is provided helpful d-pad icons about "OK" "Search" and "Back" (In ozone, all other GUIs expect you to know how search, unbind, reset, and every other feature already work)

The user can bind every action to escape if they so please. Maybe this is a "feature", but the claim is that its unfriendly.

Steps to reproduce the bug

Go to any menu where hotkeys are bound. For example "Hotkey Binds"

Bisect Results

No bisection occurred.

Version/Commit

You can find this information under Information/System Information

• RetroArch: 1.8.5

Environment information

• OS: Linux (Arch)
• Compiler: [In case you are running local builds]

Start in the RetroArch "Hotkey Binds" menu and reproduce the conflicting-binding behavior described in the issue. Trace the UI path used by pages where hotkeys are bound; done means the interface explains how to unbind keys and assigning a key to one action removes it from other actions in the same menu.