Don't Plot Preexisting Graph Elements

[jmsfltchr]

What is the goal of this PR?

Update graph plots in line with the loss function being used (where preexisting graph elements are not penalised)

What are the changes implemented in this PR?

• Preexisting graph elements are only drawn for the ground truth plot
• Use consistent colours and change only the opacity to indicate certainty
• Simplify the plotting code