Fix divider on vertical basic button group #1677

RELEASE-NOTES.md

@@ -11,6 +11,7 @@
 
 **Bugs**
 
+- **Button** - Fixes formatting for `disabled button` inside `ui buttons`
 - **API** - Fixed bug where API would query resource immediately when specifying `on: false`
 - **API** - Fixed bug where `$.api('get xhr')` was not correctly returning xhr promise
 - *Sticky** - Fixes issue with container size not being set explicitly on rail due to improper method renaming

src/definitions/elements/button.less

@@ -718,6 +718,14 @@
   border-left: none;
 }
 
+.ui.basic.vertical.buttons .button {
+  border-left-width: 0px;
+  border-top: @basicGroupBorder;
+}
+.ui.basic.vertical.buttons .button:first-child {
+  border-top-width: 0px;
+}
+
 
 
 /*--------------