Migrated code from Matplotlib to Plotly

[gpsub]

Dear Sir,
I hope you are doing well.

I felt that Plotly would be a more modern, easy to use and feature-rich library for the dashboard visualizations, so I have
made all the required changes in the code so that all the graphs use Plotly now instead of Matplotlib.

The main upgrades which are there are:

1. Tooltips for all the data visualizations so that the data can be easily and accurately interpreted for any point
2. Any number of plots can be compared now in the time series tab (previously it was capped to a maximum of 4), and the color allocation is managed automatically by Plotly
3. Mini-sliding window feature in the time series tab, for easy and more granular zoom view of the graphs
4. Uniform y axis when comparing different variables in the time series tab, previously when comparing different variables the axis would show different y-values like 400,1200,200 at the same vertical level, making it difficult to interpret the differences.
   P.S for the plotly, voila version==0.4.1 would be required to run it.

Thanks & Best Regards,
Giri Prasad