Allow time view - timeline

[EatingW]

Poker planning notes:

• Displaying a timeline for users to jump to different steps of the graph.
• Display the total number of steps
• Allow user input for jumping to a particular step with input validation
• Won't display mutation reason and highlighting for these kinds of jumps
  • Maybe only highlight the mutation from the prev step
• Can still use the naive way of applying all mutations/ starting from the original graph
• Should we always use one servelet?
  • Having a single servelet to handle all parameters is fine
  • Also currently only one servelet has the guava graph
• How to consider this done:
  • Demo with timeline and user input, see a mutated graph when click the timeline/input the mutation number
  • Tests for sending the correct request
  • Tests for applying the right mutations

Proposed estimate: 4

[EatingW]

Additional notes:

• How to display a timeline for something with >3000 steps?
  • continuous slider https://material.io/components/sliders, calculate on the client side the position relative to the ends and calculate the steps
• Displaying color on the slider based on mutation?
  • Hard to implement, also might be more confusing to users
• What about when the graph is filtered?
  • Slider size won't change.
  • slider would only represent the relevant mutations
  • slider position would be relative to the relevant mutations (not the total number of mutations)
• Text box to input exact mutation number besides it
• Next/prev button would move the slider with it

Note: base this PR's branch off highFilter to get the latest changes on filtering + next/prev