failover alert for cases where users might lose data should be more quantifiable

Recently a user posted a support ticket for this alert message http://grab.by/jPZm they got when clicking the failover button.

this Alert should be more accurate in terms of how much data we might lose if possible.
the user had no issue with replication before the node failed and no issues after failing over the node, but this alert created anxiety and concerns.

We might want to at least show the replica and active item counts. the more challnaging part is knowing how many updates/deletes will be lost in this case

Assigning to Dipti for prioritization.