Bug 544975 - 'Open Project' does not refresh before opening

With this change OpenProjectAction will trigger a background refresh for
the project, ensuring that the project resources are up-to-date if the
project changed in the file system while being closed. This can e.g.
occur due to an update in the projects repository.

Change-Id: Ic945accd6ab74e5f7b64b523b1668b5ee5dca18f
Signed-off-by: Simeon Andreev <simeon.danailov.andreev@gmail.com>