userportal: Add quota bar tool-tip

Quota bar had only a basic tool-tip. This was a problem specifically in
cases the quota exceeded and the bar was colored red.

The new tool-tip holds a small table showing in percentage and in units
the total consumption, personal consumption, other users consumption and
free quota.

Change-Id: Icb877d23edceaccb8e1cd549bef8ef7d9d044ca7
Bug-Url: https://bugzilla.redhat.com/920250
Signed-off-by: Ofri Masad <omasad@redhat.com>