Add spinner/button longrunning class to settings save button

CHANGELOG.txt

@@ -29,6 +29,7 @@ Changelog
  * Added `WAGTAIL_APPEND_SLASH` setting to determine whether page URLs end in a trailing slash (Andrew Tork Baker)
  * Added auto resizing text field, richtext field, and snippet chooser to styleguide (Liam Brenner)
  * Support field widget media inside `StreamBlock` blocks (Karl Hobley)
+ * Spinner was added to Save button on site settings (Liam Brenner)
  * Fix: The currently selected day is now highlighted only in the correct month in date pickers (Jonas Lergell)
  * Fix: Fixed crash when an image without a source file was resized with the "dynamic serve view"
  * Fix: Registered settings admin menu items now show active correctly (Matthew Downey)

docs/releases/1.5.rst

@@ -54,6 +54,7 @@ Minor features
  * Added ``WAGTAIL_APPEND_SLASH`` setting to determine whether page URLs end in a trailing slash - see :ref:`append_slash` (Andrew Tork Baker)
  * Added auto resizing text field, richtext field, and snippet chooser to styleguide (Liam Brenner)
  * Support field widget media inside ``StreamBlock`` blocks (Karl Hobley)
+ * Spinner was added to Save button on site settings (Liam Brenner)
 
 Bug fixes
 ~~~~~~~~~

wagtail/contrib/settings/templates/wagtailsettings/edit.html

@@ -33,7 +33,7 @@
         <footer>
             <ul>
                 <li class="actions dropdown dropup match-width">
-                    <input type="submit" value="{% trans 'Save' %}" class="button" />
+                    <button type="submit" class="button button-longrunning" tabindex="3" data-clicked-text="{% trans 'Saving...' %}"><span class="icon icon-spinner"></span><em>{% trans 'Save' %}</em></button>
                 </li>
             </ul>
         </footer>