Fix the dot overlaps with the table border in Availability Zones table

Add space between the dot and table border in Availability
Zones table.

Change-Id: Ic4107c446b015eb72a54496a7a7ef6e2b0a53554
Closes-bug:#1309381
(cherry picked from commit 9456d69e02139c5cf891069a997ae03def0d242a)
Image uploads should always happen in the background

Sufficiently large image uploads into Glance from Horizon can cause
timeout errors, since the image upload needs to complete before the
view can render, and such activities can cause browser timeouts.
Since the webserver already has the file, and close-to-open semantics
should prevent cleanups from losing any data, just send it in a
background thread, the same way as if you told Horizon to fetch it
from a remote location.

Change-Id: Ia056367032e0d08edf6f36a8e9f900fddba85fdf
Closes-Bug: 1322399
Closes-Bug: 1325787
Merge "Fix the dot overlaps with the table border in Availability Zones table" into stable/icehouse