increasing fat_bands_slide/ removing spline

[AndresOrtegaGuerrero]

This PR address #875

We are increasing the max value of fat bands to 2.0
We are removing the spline option
We additionally are switing to plotly.graph_objects.Scattergl since is lighter and it shows a better performance response ( > 80 atoms)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 67.15%. Comparing base (30ea955) to head (8cff169).
Report is 114 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #883   +/-   ##
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  Coverage   67.15%   67.15%           
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  Files          51       51           
  Lines        4707     4707           
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  Hits         3161     3161           
  Misses       1546     1546           

Flag	Coverage Δ
python-3.11	67.15% <100.00%> (ø)
python-3.9	67.18% <100.00%> (ø)

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[superstar54]

Hi Andres, thanks for the PR.

I noticed there is a little difference at the bottom of the bands plot:
old one:

new one

Is it acceptable that there is not lines there?

[AndresOrtegaGuerrero]

@superstar54 Yeah I noticed this , emm it might be due to using Scattergl , for me it is , actually it might less confusing that it just shows a bar, i check and the behaviour of the limiting bar still does the same work. Since i am observing way better performance for big system , this is acceptable for me. Also because in the past some people were confused that the display of the lines so i see it as a win/win :D

[superstar54]

Thanks! LGTM!