Arvados » Arvados Workbench 2

As a user I would like to see all content which I marked as "favorite"
so that I could read, filter and paginate all favorite kinds of data

Acceptance criteria:
- favorite content is visible
- connected contents api with data explorer
- provided filtering, sorting and pagination
- customized table for user needs (option to disable and enable columns: status, type, owner, file size, last modified)
- when file is already marked as favorite, in context menu is visible "Remove from favorite", instead of "Add to favorite"

User flow:
1. Click on "Favorite" tab in tree context menu.

2. "Favorite" view with table with favorite content appears.

Mockup: https://3czrf1.axshare.com/#g=1&p=8__favorite&c=1