label sizes on colorbars and labels running off the page

[AnsleyManke]

1. This has been an issue going back to older versions of Ferret and Pyferret. When there's limited space at the plot edge for a vertical colorbar the labels may run off the page despite code that tries to adjust the label sizes. If the levels are all non-negative they're ok.

yes? use etopo60
yes? set view ur; shade rose
!  If the levels are all non-negative they're ok.
yes? set view lr; shade  if rose gt 0 then rose

Another issue, in PyFerret only, if the default Hershey font is used, the labels on horizontal colorbar are invisibly tiny.

> pyferret

yes? use etopo60; shade/key=horiz rose

! Use any system font, then they're ok
yes? set text/font=sans_serif 
yes? use etopo60; shade/key=horiz rose

[AnsleyManke]

This is fixed. Also, for vertical colorbars that are short, e.g. because they're in a viewport, automatically adjust the label interval so they aren't so crowded. This was already done for horizontal colorbars.

I will merge this over to the pyFerret branch, I want to test things more there.

[AnsleyManke]

This is checked in and merged to the PyFerret branch where the horizontal colorbar issue is also fixed.