processDebugInputs() doesn't process inputs correctly

[produceconsumerobot]

Describe the bug
I think this Serial.read()

EmotiBit_FeatherWing/EmotiBit.cpp

Line 1649 in 0400fcb

if(Serial.read() == 'F')

steals the char and breaks this Serial.read()

EmotiBit_FeatherWing/EmotiBit.cpp

Line 3927 in 0400fcb

char c = Serial.read();