tsview: improved auto figsize for geocoded TS file

[yunjunz]

Description of proposed changes

• tsview:

  • timeseriesViewer.plot(): consider the SNWE for geocoded file when plotting in geo coordinate, for a more suited figure size
  • get_model_param_str(): do not show the intercept in the model fitting result, as it's not useful

• view

  • update_inps_with_file_metadata(): add "_nws" suffix if showing a single subplot without whitespace
  • display pi symbol if min/max is very close 1e-3 via the following changes:
    • utils.plot.auto_adjust_colormap_lut_and_disp_limit(): convert near-pi value to pi if they are very close <1e-3
    • utils.plot.plot_colorbar(): display pi symbol on the colorbar if displaying limits are very close to -pi/pi (<1e-3)

Reminders

• [x] Pass Pre-commit check (green)
• [x] Pass Codacy code review (green)
• [x] Pass Circle CI test (green)
• [x] Make sure that your code follows our style. Use the other functions/files as a basis.
• [x] If modifying functionality, describe changes to function behavior and arguments in a comment below the function declaration.