Display the lat/lon of first point and update the heading and length of the first line in real-time for survey patterns

[rolker]

For survey patterns, after the first click, display the lat/lon of first point and update the heading and length of the first line in real-time. After the second click display and update the distance of the second dimension of the pattern, the distance between successive lines, the cumulative distance of the entire pattern, and given a default speed the time to compete the pattern. After the survey pattern is drawn, display all these parameters allowing modification of any of them.