Visualize PG

Description of issue:

Given a valid PG, then the PG should be able to be visualized in a GUI similar to the visualization of the SFG #20 (closed).

Linked Requirements:

( 40 )

Potential Issues:

None

Blockers:

#25 (closed)

Issue Requirements:

1. Given a valid PG, then the user should be able to visualize a PG in a GUI.
2. The visualized PG should clearly show that it is a PG with the correct notation and information.
3. The user should be able to interact with the visualization in some form, for example, by interacting with a specific part of the visualization to get more information.

Comment:

Please look at #20 (closed) for information on how this can be implemented.