Misc. Styles: minor fixes and improvements on Icons Page

Bug 4823 - Summertime: minor fix on Icons page
Bug 4824 - Abstractia: minor display issue on Icons page
Bug 4825 - Database: add shadow around icons on icons page
http://bugs.dwscoalition.org/show_bug.cgi?id=4823
http://bugs.dwscoalition.org/show_bug.cgi?id=4824
http://bugs.dwscoalition.org/show_bug.cgi?id=4825
-- Consistent vertical alignment in Summertime
-- Consistent display and vertical alignement in Abstractia
-- Add shadow effect around icons on Icons page for a consistent look