[NTP] When clearing attribution set cursor to default

Cursor should be set to 'default' instead of 'none'.

Bug: 977948
Change-Id: I2d4619f26bd33524718c1d3993fc6162fa2a3485
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1674410
Commit-Queue: Kyle Milka <kmilka@chromium.org>
Commit-Queue: Kristi Park <kristipark@chromium.org>
Auto-Submit: Kyle Milka <kmilka@chromium.org>
Reviewed-by: Kristi Park <kristipark@chromium.org>
Cr-Commit-Position: refs/heads/master@{#671902}

chrome/browser/resources/local_ntp/customize.js

@@ -303,7 +303,7 @@ customize.clearAttribution = function() {
   const attributions = $(customize.IDS.ATTRIBUTIONS);
   attributions.removeAttribute('href');
   attributions.className = '';
-  attributions.style.cursor = 'none';
+  attributions.style.cursor = 'default';
   while (attributions.firstChild) {
     attributions.removeChild(attributions.firstChild);
   }