Fixes :not specificity adding too much weight to button state selector

src/elements/button.less

@@ -122,7 +122,7 @@
       Hover
 ---------------*/
 
-.ui.button:not(.loading):hover {
+.ui.button:hover {
   background-image: linear-gradient(rgba(0, 0, 0, 0), rgba(0, 0, 0, 0.08));
   color: rgba(0, 0, 0, 0.7);
 }
@@ -139,8 +139,8 @@
       Down
 ---------------*/
 
-.ui.button:not(.loading):active,
-.ui.active.button:not(.loading):active {
+.ui.button:active,
+.ui.active.button:active {
   background-color: #F1F1F1;
   color: rgba(0, 0, 0, 0.7);
   box-shadow: 0px 0px 0px 1px rgba(0, 0, 0, 0.05) inset !important;