Add ability for use of parameters in the Superscript and Subscript text syntax @+<param_name>@# and @-<param_name>@#
This would be very useful for custom hole charts with hole callout notes when certain hole sizes have non-symmetric tolerances.
For example the tap drill for a #4 helical insert is a #31 drill, .120" diameter. Allowed minor diameter per NASM spec (rounded to 3 place decimals) is .118"-.125". So the preferred hole callout would be .120+.005/-.002. This uses the standard tap drill and the tolerance range permitted per the NASM spec. When displaying this hole callout on a drawing or model annotation we would typically stack the tolerances (i.e. +.005 over the -.002) in super/subscript. This is currently not possible when the hole sizes and tolerances are entered into the hole chart as parameters, since the Superscript and Subscript syntax above only allows plain text.