Extract the MotorRowFilter out of the ThrustCurveMotorSelectionPanel to
facilitate adding more filters.
Refactor the api so the motor mount goes into the
ThrustCurveMotorSelectionPanel.  This allows greater flexibility in
filter functionality.
Added manufacturer selection boxes and exclude motors currently used
filters.
Relocate the swing files into the swing/ project.  They were misplaced with the rebase.