webadmin, userportal: fixed spacing for grids

CSS for first columns in all grids was broken such that left
padding wasn't applied. Fixed.

Also added a bit more padding between cells to prevent text
in adjacent cells from being 0 pixels apart.

Also noticed that icons in grids (comment icon, VM circle icon,
etc.) were not centered. Fixed.

Change-Id: Id5a759b8208b17bb9378a8b3f3362c20ca02add9
Bug-Url: https://bugzilla.redhat.com/1131975
Bug-Url: https://bugzilla.redhat.com/1127674
Signed-off-by: Greg Sheremeta <gshereme@redhat.com>