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This is the frontend MR that accompanies deltaflight!3 (merged) from the firmware. This MR does the following:

• Modifies the MotorMixRule "class" to accept extra forward and lateral parameters
• Modifies the MSPv2 parser to accept the extra parameters, and send them when setting the motor mixer values
• Adds the two extra columns in the mixer table UI so that the user may input the extra parameters