PerspectiveTransform property fields (llx, lly, etc) are capped at value 10

[TelKel81]

PerspectiveTransform, the value of properties (llx, lly, etc) are constrained between -10 and 10

Expected Behavior

Unlimited value (or up to max int size I guess) should be allowed

Current Behavior

value clamped to -10 min, 10 max

Steps to Reproduce

Select the effect, change property values

Your Environment

Screenshots