Add dynamic prompt input for QueuePopup window subclass

[bntrtm]

In its current state, the QueuePopup window subclass is not entirely agnostic of Tagman's business logic, as a component class ought to be.

A full explanation of the issue is written as a TODO here:

tagman/src/components/windows.py

Lines 113 to 130 in f91ba80

	def progress(self):
	if self.queue:
	self.current = self.queue.pop()
	if not self.current:
	self.queue = None
	self.caller_win.end_queue()
	return
	if self.checkbox_var.get() == 1:
	self.confirm_yes()
	return
	self.__l_info.config(
	# TODO: Find a way to separate this from the popup class.
	# In theory, an optional "prompt" input could be plugged in here,
	# but then it couldn't format it with the path.
	# The fix will likely involve a Queue subclass of some sort that
	# could push a prompt along with the item.
	text=f"No corresponding .txt file exists for image: \n'{self.current}'. \nWould you like to create one?"
	)