dialog: restore cancel button (fix #864)

We autofocus the confirm button with MutationObserver

Signed-off-by: Varun Patil <radialapps@gmail.com>

src/styles/patch.scss

@@ -21,11 +21,4 @@ li.list-item__wrapper {
 // Make OC dialogs larger to a minimum width
 div.oc-dialog[role='dialog'] {
   min-width: min(400px, 90vw);
-
-  // This close button is annoying since it does
-  // the same thing as the cancel button but needs
-  // two tabs to reach the OK button when visible.
-  button.oc-dialog-close {
-    display: none;
-  }
 }