Navigation Mode and Keyboard Shortcuts

[talldan]

Is your feature request related to a problem? Please describe.
Previously, contributors to the project have had a torrid time implementing block keyboard shortcuts. The issues are:

• Keyboard shortcuts cannot involve a printable character, as the user's key interaction is primarily typing text
• Keyboard shortcuts cannot clash with browser, accessibility tools and os shortcuts
• Keyboard shortcuts need to be memorable and related to the action

After going through these steps to identify an appropriate shortcut for a feature it often turns out there are no decent candidates.

Describe the solution you'd like
Navigation mode seems like an opportunity. With the way it works now it eliminates this rule:

Keyboard shortcuts cannot involve a printable character, as the user's key interaction is primarily typing text

This opens up many opportunities. Some ideas for shortcuts that only exist in nav mode:

• Holding Cmd and using arrow keys moves blocks
• Shift and arrow keys multi-select blocks
• G groups blocks
• D duplicates blocks
• Numerical keys focus sidebar panels

[shaunandrews]

Not sure there's much here for design right now, but I agree that while in Select mode we could open up to allow more keyboard commands.