Release Notes for 424

Changed microprofiler label "uiStep" to "frameStep", "jointsStepUi" to "stepAnimatedJoints". Added joint counts to tooltip for stepAnimatedJoints.

Added BasePart.Mass as a property. Once this is enabled we'll deprecate BasePart:GetMass() in favor of this.

Fixed an issue by which setting the "Playing" property on a sound would result in excess network traffic even if the property did not change

Fixed a bug with TweenService that would cause the client to crash

Studio: Fix input methods becoming inactive after clicking on an already focused textbox

Fix selected text not being cleared when typing using an input method

Fixed an issue by which setting the "Playing" property on a VideoFrame would result in excess network traffic even if the property did not change