Made master checkbox pixel perfect

misago/static/misago/css/misago/tables.less

@@ -22,7 +22,7 @@
       background: none;
       border-color: transparent;
       .box-shadow(none);
-      margin-right: @padding-small-horizontal;
+      margin-right: @padding-small-horizontal - 1px;
       padding: 0px 6px;
       transition: 0s;