regular buttons (e.g. Cancel) in ui-dialogs looking like links

src/sass/_variables.scss

@@ -231,6 +231,10 @@ $changeset-deleted-color:       $brand-danger !default;
 
 $btn-font-weight:               normal !default;
 
+$btn-link-color:                $link-color !default;
+$btn-link-bg:                   $body-bg !default;
+$btn-link-border:               $body-bg !default;
+
 $btn-default-color:             $gray-darkest !default;
 $btn-default-bg:                $gray-lightest !default;
 $btn-default-border:            $gray-lighter !default;

src/sass/components/_jquery-ui.scss

@@ -173,6 +173,10 @@
     .ui-dialog-titlebar-close {
         right: .5em;
     }
+
+    input[type="button"] {
+        @include button-variant($btn-link-color, $btn-link-bg, $btn-link-border);
+    }
 }
 
 .ui-widget-overlay {