Fix FIFO usage
m_propriorityQueue and m_queue are used as FIFO queues, so we need
to use takeFirst() instead of takeLast() when removing elements
from the queue.
While at it, add a comment so that we will remember these are FIFO queues.
m_propriorityQueue and m_queue are used as FIFO queues, so we need
to use takeFirst() instead of takeLast() when removing elements
from the queue.
While at it, add a comment so that we will remember these are FIFO queues.