ToDo

[mateczentye]

• fix global limits method
• expand on space-time diagram to include magneto acoustic speeds and to take argument for radial component - defults to 0 so along the axial axis.
• make all compound plot's subplot available as singular plots
• rename methods to follow a systematic naming convention like plot_variable (move multi axis plots into one and give an argument for what axis to plot, or all, or magnitude)
• make unit tests
• set up setters and getters
• make documentation
• move all calculated variables once subclasses are done to super class and call them from there
• check why codecov shows different coverage value to coverage test locally

started using subclasses for plotting and utility functions as main module is getting long and hard to navigate.