Added MoveFromMouth Actions

[amalnanavati]

Describe this pull request. Link to relevant GitHub issues, if any.

This web app change corresponds to ada_feeding #56. Specifically, it adds two more states to the web app, for when it is moving above the plate from the mouth, and for when it is moving to the resting position from the mouth. It modifies the buttons after transfer to go to those states.

Explain how this pull request was tested, including but not limited to the below checkmarks.

1. Launch the dummy nodes for robot motion and the web app.
   • Run the web app, trying a variety of buttons to transition between states. Verify that everything works as expected.
   • Click the button after transfer to move the robot above the plate. Verify that it calls MoveFromMouthToAbovePlate
   • Click the button after transfer to move the robot to the resting position. Verify that it calls MoveFromMouthToRestingPosition.
2. Launch MoveIt, the actual robot motion nodes, etc. on the real robot.
   • Run the web app, trying a variety of buttons to transition between states. Verify that everything works as expected.
   • Click the button after transfer to move the robot above the plate. Verify that it calls MoveFromMouthToAbovePlate
   • Click the button after transfer to move the robot to the resting position. Verify that it calls MoveFromMouthToRestingPosition.

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