Fix external link icon black background

(cherry picked from commit 65f3d99693762a86bcd6e29d3bc5c528b6ffce54)

editor/icons/ExternalLink.svg

@@ -1 +1 @@
-<svg height="16" viewBox="0 0 16 16" width="16" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><clipPath id="a"><path d="m0 0h16v16h-16z"/></clipPath><g clip-path="url(#a)" fill="#e0e0e0"><path d="m-1940-64.061 5.5-5.5-2.44-2.439h7v7l-2.439-2.439-5.5 5.5z" transform="translate(1944.939 73)"/><path d="m12 15h-8a3.079 3.079 0 0 1 -3-3v-8a3.04 3.04 0 0 1 3-3h2a1 1 0 0 1 0 2h-2a1.04 1.04 0 0 0 -1 1v8a1.083 1.083 0 0 0 1 1h8a1.068 1.068 0 0 0 1-1v-2a1 1 0 0 1 2 0v2a3.063 3.063 0 0 1 -3 3z"/></g></svg>
+<svg height="16" viewBox="0 0 16 16" width="16" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g fill="#e0e0e0"><path d="m-1940-64.061 5.5-5.5-2.44-2.439h7v7l-2.439-2.439-5.5 5.5z" transform="translate(1944.939 73)"/><path d="m12 15h-8a3.079 3.079 0 0 1 -3-3v-8a3.04 3.04 0 0 1 3-3h2a1 1 0 0 1 0 2h-2a1.04 1.04 0 0 0 -1 1v8a1.083 1.083 0 0 0 1 1h8a1.068 1.068 0 0 0 1-1v-2a1 1 0 0 1 2 0v2a3.063 3.063 0 0 1 -3 3z"/></g></svg>