Remove box-shadow from UI, fix dashboard issue (#3065)

public/less/_base.less

@@ -146,6 +146,12 @@ pre, code {
         }
     }
 
+   &.menu,
+   &.vertical.menu,
+   &.segment {
+       box-shadow: none;
+   }
+
     .text {
         &.red {
             color: #d95c5c !important;

public/less/_dashboard.less

@@ -48,6 +48,11 @@
             }
         }
     }
+
+    /* Accomodate for Semantic's 1px hacks on .attached elements */
+    .dashboard-repos {
+        margin: 0 1px;
+    }
 }
 
 &.feeds {