Add ESC RPM and Temperature. Add missing mode background colors

[AlexKlimaj]

This PR adds a new graph with ESC RPM if it exists in the log. Along with plotting ESC temperatures if they are present.

I also added the missing background colors for mode changes to other plots.

[dakejahl]

nice!

[dakejahl]

Good to merge

[bkueng]

This broke things. Could you please do cross-testing against other logs in future?

Traceback (most recent call last):
  File "/home/ubuntu/flight_review/app/plot_app/main.py", line 230, in <module>
    plots = generate_plots(ulog, px4_ulog, db_data, vehicle_data,
            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/ubuntu/flight_review/app/plot_app/configured_plots.py", line 644, in generate_plots
    if 'esc_count' in data_plot.dataset.data:
                      ^^^^^^^^^^^^^^^^^^^^^^
AttributeError: 'NoneType' object has no attribute 'data'

[AlexKlimaj]

This broke things. Could you please do cross-testing against other logs in future?

Traceback (most recent call last):
  File "/home/ubuntu/flight_review/app/plot_app/main.py", line 230, in <module>
    plots = generate_plots(ulog, px4_ulog, db_data, vehicle_data,
            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/ubuntu/flight_review/app/plot_app/configured_plots.py", line 644, in generate_plots
    if 'esc_count' in data_plot.dataset.data:
                      ^^^^^^^^^^^^^^^^^^^^^^
AttributeError: 'NoneType' object has no attribute 'data'

#312