Improve status monitoring for Geo Nodes

Right now, this is what we show in the Geo dashboard:

We should enhance with more information to provide more feedback to the user.

Add the following information:

If we are viewing the Geo dashboard from a secondary node, clearly indicate which node we are.
Add replication status: In progress, done, failure gitlab-org/gitlab-ee#3195
- In case of done and failure, indicate the date of the last sync operation
Number of attachments synced (total and %)
Number of LFS objects (total and %)
Number of CI artifacts (total and %) gitlab-org/gitlab-ee!3189
Indicate the status of the database replication
Use number_with_delimiter for "# synced", and maybe 4 decimals for the percentages gitlab-org/gitlab-ee!3090

Current	Proposed wireframe

Edited Nov 08, 2017 by Toon Claes