Add action buttons to map

[spamguy]

A line of buttons with radio behaviour should be added near the map that allow changing between movement types. Angular Material's Speed Dial component would be a neat way of storing them. At minimum, the types would be

• hold
• move
• support
• convoy

Plus, a fifth button for clearing individual orders.

Shortcut keystrokes should also be available.

[spamguy]

Done.