Historic: center icon of memorials

historic.json

@@ -74,7 +74,7 @@
             "zoom": 14
         },
         "memorial": {
-            "sign": "<img src='maki:monument?size=11'>",
+            "sign": "<span  style='position: relative; top: -2px;'><img src='maki:monument?size=11'></span>",
             "zoom": 14
         },
         "monument": {
@@ -82,4 +82,4 @@
             "zoom": 11
         }
     }
-}
+}