update

src/sass/gnome-shell/common/_buttons.scss

@@ -17,8 +17,8 @@
 }
 
 .button {
-  min-height: $item_size;
-  padding: 0 $base_padding * 2;
+  min-height: 20px;
+  padding: $base_padding $base_padding * 2;
   border-radius: $base_radius;
   border: none;
   @extend %button;