Method pop_back

extensions/olcPGEX_Network.h:232–238

Removes and returns item from back of Queue

			// Removes and returns item from back of Queue
			T pop_back()
			{
				std::scoped_lock lock(muxQueue);
				auto t = std::move(deqQueue.back());
				deqQueue.pop_back();
				return t;
			}

			// Adds an item to back of Queue
			void push_back(const T& item)