textbox for measurements too small, text is partly visible

[mtbeek32]

see e.g.:

possible solutions:

• increase size of textbox
• use a maximum size of the contents of the text box

[eoudejans]

Suggestion: change to float32, to limit decimals.
Coordinates: also limit decimals

[eoudejans]

Using boost.format statusbar coordinate numericals for coordinates and measurements are formatted with 10 digits and precision of 2 digits: