Add directions widget

[seanerice]

Purpose

New widget to calculate directions between two points. Points are selected by clicking on the map.

Todo

• [x] add "Starting position" input field
  • [x] when the input is focused, user can click on the map to set value
• [x] add "Destination" input field
  • [x] when the input is focused, user can click on the map to set value
• [x] Calculate directions once both values are set

Acceptance Criteria

• verify "Starting position" input field is focused after clicking on the input
• verify "Starting position" input field is populated by clicking on the map
• verify "Starting position" is displayed visually on the map with a marker
• verify "Destination" input field is focused after clicking on the input
• verify "Destination" input field is populated by clicking on the map
• verify "Destination" is displayed visually on the map with a marker
• verify route is calculated once "Starting position" and "Destination" are set
• verify route is displayed visually on the map with a line
• verify that route is re-calculated after updating either "Starting position" or "Destination" input fields

[seanerice]

Progress