[bug] fix sorting controls when a group is empty

Author: zombieFox

src/css/form.css

@@ -312,8 +312,7 @@ input[type="radio"]{
 margin-bottom:0;
 position: absolute;
 top:0;
-left:50%;
-transform:translateX(-50%);
+left:0;
 opacity:0;
 display: block;
 font-size:1em;

src/css/group.css

@@ -113,7 +113,6 @@
 }
 
 .group-body{
-font-size:calc(var(--link-item-size) *1);
 background-color: transparent;
 position: relative;
 min-height:var(--link-item-height);