Merge Sort, Pause Button, Autofill Buttons

Coded the Merge Sort with emphasis on making it obvious what is
happening.

Configured Pause Button, perhaps not in the most efficient way but in a
way that works.

Added three buttons to automatically fill the list - ordered, reversed,
and randomized.
Autofill Buttons, Pause Button, Merge Sort

Added three buttons- ordered, reversed, and randomized which autofilled
the list.

Pause button works as expected, perhaps not coded in the most efficient
way.

Merge Sort coded, with emphasis on ease of understanding.

Ideas/To do:
-have the system run the sorts once without delay to compare time
elapsed (?) perhaps via a separate button
-add a textbox to each JPanel to output each step including final sort
order and steps required (using a counter)
-code the last algorithm