[breadcrumb] Make the breadcrumb caret icon CSS cursor: default

The caret icon between the breadcrumb <button> is never interactive so
always show a CSS default cursor for the caret icon.

Bug: 1062902, 1035691
Change-Id: I022752f55e8c3c527d1c7ced2aa488b13a8b789a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2114473
Commit-Queue: Noel Gordon <noel@chromium.org>
Reviewed-by: Luciano Pacheco <lucmult@chromium.org>
Cr-Commit-Position: refs/heads/master@{#752710}

ui/file_manager/file_manager/foreground/js/ui/breadcrumb.js

@@ -27,6 +27,7 @@ const breadCrumbTemplate = `
       -webkit-mask-position: center;
       -webkit-mask-repeat: no-repeat;
       background-color: currentColor;
+      cursor: default;
       display: inline-flex;
       height: 20px;
       padding: 8px 0;