tip: monitoring temperature during builds

[Whosawhatsis]

For those asking about monitoring extruder/bed temperatures during
builds, I found a useful bug that exists at least in RepG 25. What you
need to do is, while printing from an SD card, click the button to
disconnect from the bot. The print will continue, and once you
reconnect you can open the control panel without interrupting the
print and the temperatures will show up in the graph. My bed
temperature is spiking all over the place, but it's centered around
the correct value, so I'm guessing this indicates a bad connection,
which I wouldn't have known about otherwise and can now try to fix!