Better nomination management

[rossbulat]

This is an issue that will track the improvement of nomination management.

• When managing active nominations, allow removal and addition of nominators in one submit. Right now the two actions are separate. Take config from nominator setup to allow such functionality.
  Canvas overlay nomination management #1516
• Streamline the validator selection by making the selection categories an overlay.
  Canvas overlay nomination management #1516
• Give historical context of validator performance in list items.
  feat: Add validator pulse graph to list items #1530
• Order nomination lists by nomination status.
  feat: Order nominations by nomination status. #1543
• Make nominator generation methods more intelligent with performance metrics.
  feat: add validator performance ranks & quartiles, quartiles in generation methods #1546
• Give historical context of pool performance in list items.
  feat(ux): Pool rewards worker & pool performance graphs #1547