Add option to use underscores with bold & italic hotkeys

Feature requests
21

Sorry, but Unlike the Obsidian-native Shortcuts,
most of these Plugins don’t support formatting Multi-Selects or Table-Ranges.

They also don’t undo the alternative Markup,
so if you have **text** and apply the Wrapper or other Plugins
you usually end up with __**text**__ instead of text.

23

Just add me here as +1. Markdown’s greatest syntactic fault is not defining asterisks as bold and underscore as emphasis. I wish they’d fix this permanently.