Connects to #358. Dependency updates and search UI refactoring.

[jimmyzhen]

Key Changes

Dependency updates (see #358 for more details):

• Switched vis-network-react module source from no-longer-maintain repo to a forked repo containing upgraded version of vis-network library
• Removed individually installed vis-network and vis-data modules since the forked vis-network-react module contains upgraded versions of these libraries
• Converted JSON to JavaScript object for the PASS1B-06's network figure (4e) used on homepage since newer version of vis-network library supports html markup in tooltip
• Removed console.log callback handlers from prior vis-network-react implementation

Search UI refactoring:

• The React component responsible for rendering the radio buttons for selecting either gene, protein id, or metabolite names on the Search page contains repetitive JSX markup and produces unreliable interactive behavior
• This component has been converted into reusable child components with a parent component.

[jyu-sm]

lgtm