Re-arrange gr-repo-access to have buttons at the bottom

It seems more common the have the save button below the
form instead of at the top.

The other alternative is to have this section fixed at the top / bottom
and make the form scrollable.

Screenshot: https://imgur.com/a/43JiaVY
Change-Id: I09ab3831b226e2cbf9e93788a499bef861e152ec
diff --git a/polygerrit-ui/app/elements/admin/gr-repo-access/gr-repo-access_html.js b/polygerrit-ui/app/elements/admin/gr-repo-access/gr-repo-access_html.js
index b46c7c0..8148884 100644
--- a/polygerrit-ui/app/elements/admin/gr-repo-access/gr-repo-access_html.js
+++ b/polygerrit-ui/app/elements/admin/gr-repo-access/gr-repo-access_html.js
@@ -37,6 +37,9 @@
     .weblink {
       margin-right: var(--spacing-xs);
     }
+    gr-access-section {
+      margin-top: var(--spacing-l);
+    }
     .weblinks.show,
     .referenceContainer {
       display: block;
@@ -94,25 +97,6 @@
           </a>
         </template>
       </div>
-      <gr-button id="editBtn" on-click="_handleEdit"
-        >[[_editOrCancel(_editing)]]</gr-button
-      >
-      <gr-button
-        id="saveBtn"
-        primary=""
-        class$="[[_computeSaveBtnClass(_ownerOf)]]"
-        on-click="_handleSave"
-        disabled="[[!_modified]]"
-        >Save</gr-button
-      >
-      <gr-button
-        id="saveReviewBtn"
-        primary=""
-        class$="[[_computeSaveReviewBtnClass(_canUpload)]]"
-        on-click="_handleSaveForReview"
-        disabled="[[!_modified]]"
-        >Save for review</gr-button
-      >
       <template
         is="dom-repeat"
         items="{{_sections}}"
@@ -136,6 +120,27 @@
           >Add Reference</gr-button
         >
       </div>
+      <div>
+        <gr-button id="editBtn" on-click="_handleEdit"
+          >[[_editOrCancel(_editing)]]</gr-button
+        >
+        <gr-button
+          id="saveBtn"
+          primary=""
+          class$="[[_computeSaveBtnClass(_ownerOf)]]"
+          on-click="_handleSave"
+          disabled="[[!_modified]]"
+          >Save</gr-button
+        >
+        <gr-button
+          id="saveReviewBtn"
+          primary=""
+          class$="[[_computeSaveReviewBtnClass(_canUpload)]]"
+          on-click="_handleSaveForReview"
+          disabled="[[!_modified]]"
+          >Save for review</gr-button
+        >
+      </div>
     </div>
   </main>
   <gr-rest-api-interface id="restAPI"></gr-rest-api-interface>