Updates rich_text_label so that the built-in documentation can be searched
Previously, it would only find the first result and would not select other results
Renames "_entered" functions to "_submitted"
Renamed to ActionMapEditor as it is more generic and can be used for more than just the InputMapEditor if required.
This also includes a new Event Configuration dialog (previously "Press A key...") which can be used to create and edit InputEvents for any use - like the Project Settings input map, or the Editor Settings shortcuts.