Finish graph look/feel & search implementations:

 * All graph panel fields are implemented with hash settings
 * The user may configure:
   * Maximum number of target nodes to search for
   * Vicinity depth around target nodes
   * Node size by node degree or state
   * Node color by node state, degree, id or wether it's part of the vicinity
   * Node outline color by node state, degree, id or wether it's part of the vicinity
 * The user can search for:
   * Node with specific ID
   * Top K nodes by State (numerical comparison) or Degree (both directions)