ENH Move search form after "search options" button (#2091)

The search form was before the "search options" button in the tab order,
which meant that after expanding the search form you had to tab
backwards to actually access the form.

Also moved the search icon as this is visually at the start of the
search box, so makes sense for the markup to be first too.

Author: GuySartorelli

client/dist/js/bundle.js

@@ -320,12 +320,12 @@ const SearchBox = ({
           <Label for={id} id={`${id}_label`} hidden>
             {i18n._t('Admin.SEARCH', 'Search')}
           </Label>
+          <div className="icon font-icon-search" aria-hidden="true" />
           { renderTags() }
           { renderInput() }
           { showEnter && renderEnterHint() }
-          { children }
-          <div className="icon font-icon-search" aria-hidden="true" />
           { showFilters && renderFilterButton() }
+          { children }
           { hideable && renderHideButton() }
         </div>
       </ResizeAware>