fix weird input element margin problem in safari

Author: claus

src/Dat.scss

@@ -200,6 +200,7 @@ $border-left-size: 5px;
             border: 3px solid $background-color;
             border-radius: 0;
             padding: 2px 5px;
+            margin: 0;
             outline: none;
             font-size: inherit;