Logic here is that if the machine can take a command we process the Queue. The reason is if you machine does nto send idle waits this should get commands pushed. Also if we do get idle waits we can process the command rather then add to the stack of todo commands. we need to fix this in serialLayer if possible. if not we may have to redo how we use printerStates so we can reasonably predict if the printer is ready for a command by using IDLE state and BUSY when processing.

This one is needed because the return for temperature is
ok T ....

we have to check this is the case on other firmwares rather then do a blanket change.

The 'ok' check don't happen, because of the else.
if check Temp
else
if check ok

And Marlin don't send ok when sending temperature.