Reviewed by me. (Bao created)

MAINT-1480: Ensuring that the new angular velocity is remembered for later comparison to the previous angular velocity.

PATH-868: Ensuring that walkability values are reset to a previous value if the empty string is entered.

MAINT-1480: Clearing the angular velocity accummulation when the updated angular velocity is set to zero.

PATH-864: Altering the minimum linksets floater size to smaller to allow fitting to 1024 width screens.