Interpolate polyobjects properly for the software renderer (resolves #950)

Before:
2024-01-30_18-54-29
After:
2024-01-30_18-55-59

added Bug Enhancement Software renderer Uncapped small labels

changed title from Interpolate polyobjects properly for the software renderer to Interpolate polyobjects properly for the software renderer (resolves #950)

approved this merge request

merged

mentioned in commit 235bf724