Release notes for 574

Show warning if user imports avatar as gltf

Improve physics solver stability for AlignPosition constraint with rigidity enabled.

Refactored legacy behavior in isClient and isServer

Fixed a bug where Models that use JointsService to store Joints didn't work properly when Streamed out and then back in.

Fixed another bug where Stream Out and Stream In would sometimes cause constraints to break on complicated mechanisms.

Fix update for Attachment::WorldCFrame when CFrame in parent changes.

Overhaul grid snap boxes: Text input behavior is more straightforward. There is no longer any lower limit to the grid snap you can enter, any value greater than zero will be accepted (though only visually displayed to three decimal places). The upper limit has been raised. Entering exactly zero will disable grid snap instead of changing the snap increment.

Correct interaction between ScaleTo and Responsiveness properties: They are no longer scaled since they are scale invariant.

The Parent property on Services now accurately shows up as uneditable.