Graph Horizontal Scrolling

[nbasargin]

This PR adds a native horizontal scrolling to the graph.

You need to hold Shift if you are scrolling with the mouse wheel (default browser behavior).
Scrolling is probably better on touch devices / trackpads.

I had to remove some CSS transitions due to conflicts with scrolling: scaling and adding new nodes is not animated anymore. This is fine since scaling is used not too often and animated insertion did move the complete graph, even if you didn't want it. Also, the SVG viewbox is gone. The graph won't resize automatically and you have full manual control over scale. Bigger screen is better.

The mock data panel can now be enabled for debugging. You can use the browser dev tools to show the debug button which toggles between chat and debug panel.

[codecov-io]

Codecov Report

Merging #142 into velvet-revolution will decrease coverage by 0.04%.
The diff coverage is n/a.

@@                  Coverage Diff                  @@
##           velvet-revolution     #142      +/-   ##
=====================================================
- Coverage              64.61%   64.57%   -0.05%     
=====================================================
  Files                     67       67              
  Lines                   4239     4245       +6     
=====================================================
+ Hits                    2739     2741       +2     
- Misses                  1500     1504       +4

Impacted Files	Coverage Δ
modules/ravestate/causal.py	89.25% <0%> (-3.28%)	⬇️
modules/ravestate_nlp/yes_no.py	95.4% <0%> (+4.04%)	⬆️

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[josephbirkner]

Works like a charm!