modify unlink icon

lib/views/me/external-accounts.html

@@ -90,7 +90,7 @@
             <td class="text-center">
               <button class="btn btn-default btn-sm btn-danger"
                   data-toggle="modal" data-target="#diassociate-external-account" data-provider-type="{{ account.providerType }}" data-account-id="{{ account.accountId }}">
-                <i class="fa fa-unlink"></i>
+                <i class="ti-unlink"></i>
                 {{ t('Diassociate') }}
               </button>
             </td>
@@ -216,7 +216,7 @@
               {{ t('Cancel') }}
             </button>
             <button type="submit" class="btn btn-sm btn-danger">
-              <i class="fa fa-unlink"></i>
+              <i class="ti-unlink"></i>
               {{ t('Diassociate') }}
             </button>
           </form>

lib/views/widget/page_alerts.html

@@ -45,7 +45,7 @@
         <input type="hidden" name="path" value="{{ page.path }}">
         <input type="hidden" name="page_id" value="{{ page._id.toString() }}">
         <button type="submit" class="btn btn-default btn-sm pull-right">
-          <i class="fa fa-unlink" aria-hidden="true"></i>
+          <i class="ti-unlink" aria-hidden="true"></i>
           Unlink
         </button>
       </form>