Release notes for 582

Adds a button to Asset Import to reset the import tree.

The Mac Client now supports input from all input method editors.

Allows SharedTable to be expanded when viewed in the Watch window.

Allows per-axis limits on max force for the LinearVelocity constraint.

Adds LogService:ClearOutput() which clears the Output window contents.

Improves MemoryStore error messages.

Adjusts the default max forces and max torques for constraints created from the ribbon toolbar to better reflect common uses.

For performance reasons, turns off language features for very long scripts or scripts with very long lines, per script.

Adds a "Reload plugins on file changed" setting to Studio to improve Rojo-based plugin development workflows.

Improves previews of materials generated by the Material Generator.

Fixes asset fetch failure in ContentProvider:PreloadAsync() for un-parented VideoFrame instances.

Fixes Microprofiler displaying unused UserTokens, enables searching timers by user-defined labels, and fixes hover tooltip displaying "$UserToken".

Fixes a bug where content streaming would sometimes leave gaps in the world in experiences with fast moving players/vehicles.

Fixes missing Lock tool icon.

Fixes interactions between Studio and engine highlight instances.

Dragging an object influenced by a RigidConstraint will always move it rather than the dragged parts sometimes snapping back to where they previously were.

Fixes issue on macOS where mouse events would have a different button number for up and down events, when control key was pressed or released during the interaction.