mobile UI for route planner

[qqnluaq]

This is my proposed new UI for the route planner for mobile use (ref #15).

First, current UI:

I propose to shrink the UI vertically, and move less essential items to a collapsed area:

There are 2 new buttons at the top: 'Route', 'Options'.
Clicking 'Options' expands the top command area:

Clicking the 'Route' button goes to a new panel with the directions for the current waypoints.

The map will show the route updated live as waypoints are added, as it does now.

I'm not sure what to do with the status message, whether it should be below the panel, as I have depicted, or maybe floating at the top, or somewhere else...