→High-Level Mouse Lock Implementation Tasks
## "there is no limit to how far movement can go...not limited by screen boundaries" -- mouse lock should mean infinite movement in the X and Y axes...There will be no limit to movementX/Y values if the mouse is continuously moved in a single direction"
## "The concept of the mouse cursor will have been removed, and it will not move off the window or be clamped by a screen edge"
## "no mouse cursor is displayed" -- mouse cursor should be hidden while locked
## navigator.pointer (readonly) is a MouseLockable - abhatnagar
## MouseLockable has lock(), unlock(), islocked() - abhatnagar