fix(elements-window): Always show by default

The elements window was offscreen by default and only
visible on the edit page screen. Since automated
browser testing tools (capybara with selenium) open
the elements index view the elements window was always
offscreen and the browser needed to scroll the window
into view. With the recent change from absolute to fixed
position this was not working anymore.

Co-authored-by: Lasse Diercks <github@lassediercks.de>
(cherry picked from commit ec563dd)

Author: tvdeyen

app/helpers/alchemy/admin/base_helper.rb

@@ -252,7 +252,8 @@ def alchemy_body_class
           controller_name,
           action_name,
           content_for(:main_menu_style),
-          content_for(:alchemy_body_class)
+          content_for(:alchemy_body_class),
+          "elements-window-visible"
         ].compact
       end
 

app/views/alchemy/admin/pages/edit.html.erb

@@ -2,8 +2,6 @@
 
 <% content_for(:main_menu_style) { 'collapsed-menu' } %>
 
-<% content_for(:alchemy_body_class) { 'elements-window-visible' } %>
-
 <% content_for(:toolbar) do %>
 <div class="toolbar_buttons">
   <div class="toolbar_button">