Plot node level water surface elevation as a heatmap

[igarousi]

We can utilize a heatmap visualization to visualize the water surface elevation profile at each timestep across nodes. The image below shows an example.

[devincowan]

Request for heat map of SE over distance hasn't been implemented, but a I updated our color palette and now we can see a similar plot of 3 dimensions. Example (showing SE dropping over time at every node in the reach: