Actually fixes #1680, issue with ribbon sizing

src/definitions/elements/label.less

@@ -319,7 +319,7 @@ a.ui.label {
   position: relative;
   margin: 0em;
 
-  left: -@ribbonDistance;
+  left: @ribbonOffset;
   padding-left: @ribbonDistance;
   border-radius: 0em @borderRadius @borderRadius 0em;
   border-color: @ribbonShadowColor;

src/themes/default/elements/label.variables

@@ -90,9 +90,10 @@
 @tagTransition: background @labelTransitionDuration @labelTransitionEasing;
 
 /* Ribbon */
-@ribbonDistance: 2em;
-@ribbonMargin: 1em;
 @ribbonTriangleSize: 1.2em;
+@ribbonOffset: ~"calc(-1rem - "@ribbonTriangleSize~")";
+@ribbonDistance: ~"calc(1rem + "@ribbonTriangleSize~")";
+@ribbonMargin: 1em;
 @ribbonShadowColor: rgba(0, 0, 0, 0.15);
 
 @blackRibbonShadow: darken(@black, 10);