Polygons with many points cause app to become unresponsive

**Describe the bug**
Some models return polygons with 6000 or more points in, the app/browser becomes un-responsive when loading them / clicking between images.

As a workaround I should probably reduce the number of polygon points.

**To Reproduce**
Add a polygon with a large number points from a prediction / pre-annotation.

**Expected behavior**
The app doesn't become unresponsive

**Environment (please complete the following information):**
- OS: Firefox / Chrome
- Label Studio Version [1.8.0]