Make keyboard shortcut help dynamic

What does this MR do?

This makes the keyboard shortcut styles dynamic, based on our keybindings definition. Also make sure that styles in typography (markdown) and keyboard shortcut help match. Now that the data is dynamic we can also add a search (which also solves the "toggle-focus" problem).

Screenshots (strongly suggested)

What	Before	After
Dark Mode
Light Mode
Search	N/A	shortcuts-after
Search (No results)	N/A

Does this MR meet the acceptance criteria?

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