Improvement for node close to metric

[HugoJourdan]

The latest indicator added, which shows a point one unit close to a metric, is currently working for all metrics. Perhaps it could be useful to skip some metrics based on the case of the layer?

If case == 1 : #Uppercase
    ignore xHeight 

if case == 2 : #Lowercase
    ignore CapHeight

[mekkablue]

Good idea. There are some tricky edge cases, though. I’ll see what I can do.