use granite status overlay instead of "basic info" pane

Instead of having the "Basic info" sidebar section we should use granite's status overlay to give context info just like Files.

Launchpad Details: [#LP1299339](https://bugs.launchpad.net/bugs/1299339) Daniel Fore - 2014-03-29 04:27:43 +0000

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Start by locating the UI code that creates the “Basic info” sidebar and compare it with the Files view’s Granite status overlay usage. Confirm the overlay provides the intended context information, then verify the sidebar is replaced and the Photos UI builds and displays the expected context.

Written by the indexing model from the issue text.