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Auto-height functionality

The auto height option sets the extruded height for a specific polygon
based on its ID. If the polygon's ID is in either name_NNN_mm
or name_NNN_NNN_mm format, the NNN_(NNN_)mm part of the name
is translated into height in milimeters.

Otherwise, the height parameter is used

Examples:
rect543_1_mm -> 1 mm height
poly456_12_5_mm -> 12.05 mm height
circle2345_3 -> according to the height parameter