Updated controls ordering and UI tooltips to be consistent with keybindings

[georgemoon]

At some point the Mapbox Draw keybindings were changed, and are now:

(1) Point
(2) Line
(3) Polygon

whereas the tooltips still have the letters l/p/m.

This pull request changes the tooltips, and also the ordering of the controls to be consistent with the numbering used.

Addresses #1103

[stepankuzmin]

Good catch! Thanks @georgemoon 👍