Long click on repo opens dialog

The long click dialog contains the following options:
1) Navigate to repository owner's page
2) [Conditionally] Remove repository from Recently Viewed

Also now refreshes repositories list when you return from
viewing a repo if the repo was added to the Recently Viewed list.
Previously, you had to manually refresh for the change to be seen.

![2013-04-19 15 53 39](https://f.cloud.github.com/assets/1417401/404217/d0e75618-a93c-11e2-9718-789373b095cd.png)
![2013-04-19 15 54 21](https://f.cloud.github.com/assets/1417401/404218/d266b358-a93c-11e2-9417-7c76f86c00d7.png)