Check for submatches after checking scales

This fixes a situation where a P was missed because it looked like a
submatch of an R, but the R wasn't really there: it was a P followed by
an H.
Tweak CaptureView for adding extra forms

Make it able to print the median scale for identifying the scale of
matches near the new form you're adding.
Add some new forms for J, 3, S, 5

Not done yet...