changed png to svg and cleaned code

app/helpers/quadicon_helper.rb

@@ -260,7 +260,7 @@ def render_physical_server_quadicon(item, options)
         end
       end
     end
-    safe_join(output.collect(&:html_safe))
+    safe_join(output)
   end
 
   # FIXME: Even better would be to ask the object what name to use
@@ -701,7 +701,7 @@ def render_single_quad_quadicon(item, options)
 
   def img_for_health_state(item)
     case item.health_state
-    when "Valid"    then "100/healthstate-normal.png"
+    when "Valid"    then "svg/healthstate-normal.svg"
     when "Critical" then "svg/healthstate-critical.svg"
     when "None"     then "svg/healthstate-unknown.svg"
     when "Warning"  then "100/warning.png"