Navigation updates to make this more usable

[heckj]

• get rid of the tabView navigation
• replace the tab that takes you to an editing view with stack navigation that takes you to an editor (if you match the reviewer) or viewer (if you don't match). That way you can at least SEE the other rankings, even if you can't edit them.
• In the overview, merge the Relevancy Rankings and Stored Searches into a single list, so we don't have lists fighting and breaking up the vertical space.
• In the ranking editor view, merge the keywords and search result ranking lists, again so we don't have lists fighting and breaking up the vertical space.