UI restructuring - single call to action

[roata]

A usable interface has a clear call to action - one thing that stands out. At the moment we have 2 such items, which compete for attention:

• my location
• pick route

The following tweaks can make the interface a bit clearer:

1. Turn the my location button into a control on top of the +/- buttons

2. Change the button style from "big red" to the same style as the +/- . This is consistent with other mapping software (Google Maps, Yandex Maps, Bing Maps), so users can be expected to have familiarity with it
   

3. Move pick route to the center of the screen, like in the previous versions

The rationale for the last point is the left-handed UI feature discussed in #54. By placing this control in the center - it will always remain in place, regardless of the handedness setting. Currently, it is always on the right - which makes it more comfortable for lefties, and less comfortable for right-handed users.

[roata]

@iamandrewluca , what do you think?

[iamandrewluca]

I aggree with you, I'll take a look into material design best practices and Google Maps design.