List Component & List Controller Class

[MichaelPastuch]

Migrate the SingleList and PagingList components from ui-builder as a simple List component:

• This component requires a pre-made ListController class, instead of a load function
• Provide static methods on the List component to create single/paging versions of ListController with a given load function
• Update ListController with basic sort/filter methods. These methods will take a callback function that is run for each item:
  • sort expects a string or number to be returned, this value will be used by lodash.sortBy, an optional "desc" flag will reverse the sort results
  • filter expects a boolean, this value will be used by lodash.filter
• Sorting and filtering that is to be done by the back-end should be done by reloading the dataset with different parameters in the data load method
• Add a reduce method to ListController, will be useful for aggregating field values in the dataset

[MichaelPastuch]

This List component has been migrated to ui-widgets, and has been simplified with a more aggressive buffering strategy. The ui-widgets example page illustrates a single grid with sorting and filtering, as well as a paging grid that loads an infinite set of dummy data.