On debug mode CLUE, terminal screen is not properly printed

[xnkevinnguyen]

Currently on debug mode, the terminal screen is not showing as it is not communicated with socket IO like other images.

Repro code to run on debug mode:

# import CPX library
from adafruit_circuitplayground import cp

print("hello world")

current: No display is shown
expected: Display terminal with print statements

[andreamah]

Fixed in #351