Create a terse navigator mode

[jgateley]

Current navigator mode is full.

Create a terse variant that assigns two functions to most buttons For example, on page 2 of a bank, preset C would be "previous page" and preset F would be "next page". Instead, only use preset F and a short press is previous, a long press is next.

Needs to be designed.

[jgateley]

Basic idea: page only uses one button instead of two: The button has a short press (release), or a long press

The menu bank, page 1, the navigator takes you to page 2

On other banks, page 1, the navigator takes you home (long), or to page 2

On other pages, short takes you up, long takes you down

[jgateley]

Completed in 0.1.2