Icon: Replace font awesome icons where possible (#28757)

* Replace font awesome icons where possible

* Implement small updates

public/app/features/dashboard/components/VersionHistory/HistoryListCtrl.ts

@@ -176,7 +176,7 @@ export class HistoryListCtrl {
       title: 'Restore version',
       text: '',
       text2: `Are you sure you want to restore the dashboard to version ${version}? All unsaved changes will be lost.`,
-      icon: 'fa-history',
+      icon: 'history',
       yesText: `Yes, restore to version ${version}`,
       onConfirm: this.restoreConfirm.bind(this, version),
     });

public/app/features/dashboard/components/VersionHistory/template.html

@@ -10,7 +10,8 @@
 
 <div ng-if="ctrl.mode === 'list'">
   <div ng-if="ctrl.loading">
-    <icon name="'fa fa-spinner'" class="fa-spin"></icon>
+  <spinner inline="true" />
+  </spinner>
     <em>Fetching history list&hellip;</em>
   </div>
 
@@ -63,7 +64,8 @@
       </table>
 
       <div ng-if="ctrl.appending">
-        <icon name="'fa fa-spinner'" class="fa-spin"></icon>
+        <spinner inline="true" />
+        </spinner>
         <em>Fetching more entries&hellip;</em>
       </div>
 
@@ -97,7 +99,8 @@
 
 <div ng-if="ctrl.mode === 'compare'">
   <div ng-if="ctrl.loading">
-    <icon name="'fa fa-spinner'" class="fa-spin"></icon>
+    <spinner inline="true" />
+    </spinner>
     <em>Fetching changes&hellip;</em>
   </div>