Keyboard controls for overall UI

[tracygardner]

• Add keyboard controls documentation popup with full documentation of blockly keyboard controls
• Add link to keyboard controls documentation on hub
• Make Escape work across UI
• Add Ctrl + B area menu

[tracygardner]

Added support for remapping keyboard controls based on input from our lived experience consultant for use with adaptive devices.

7e8b180 c5efb7d 2bea99a 4e49859 28c9af4 69d67ad

[lawsie]

Sounds good

[tracygardner]

Improved focus for menu and modal dialogs. (Focus was being placed on hidden elements and tab didn't close the main menu.)

6b85e00 514ecc4 f25293e

[tracygardner]

Make Esc work for About modal and Colour picker

aed5a0f