Add and position blocks from toolbox with keyboard

[tracygardner]

Make adding, placing and editing blocks from the toolbox fully accessible and intuitive with keyboard controls.

• Expand subcategories when you navigate to them with the keyboard (they auto expand when you click/tap)
• Esc should close flyout (and return focus to Toolbox category if that's where it came from)
• Toolbox visual highlights are unclear @lawsie
• Colour grid input editor is not selected if current colour is not a grid option - you can Tab to the container but it's not easily discoverable
• Colour grid input swatches do get a focus highlight but it isn't very visible @lawsie
• Focus highlights are not clear on grid inputs (e.g. choosing an object) @lawsie
• List mutators don't get focus highlight
• Material texture inputs don't get focus highlight @lawsie
• When cursor it outside of view, workspace doesn't scroll when block is added - review more generally to find broken scenarios
• Can we have x, y, z in blocks match the colour of the gizmos (and the gizmo show when editing) (would this scroll the object into view or just show a general gizmo on the canvas?) via @dkwdaft
• Text blocks have an a nested input that creates an extra keyboard navigation that is unnecessary
• Toolbox navigation doesn't work if you click on a category instead of navigating to the toolbox with t, hybrid should work

[tracygardner]

Expand subcategories on keyboard focus to make them discoverable.

1bc5c06

[lawsie]

👍

[tracygardner]

d8eeb73 44663e8

Make it easier to associate x,y,z with axes on gizmos

[tracygardner]

Just apply axis color highlights to selected block. Less overwhelming: