Fix bug when editing a page, the theme wasn't including blank

lib/tasks/dev.rake

@@ -81,9 +81,9 @@ namespace :dev do
     design.build_layout
     design.layout.file = File.open("#{Rails.root}/lib/fraisier/layout.html")
     
-    design.layout
-    theme
-    theme_1
+    design.layout.save
+    theme.save
+    theme_1.save
     # image.save
     # js.save
     
@@ -105,9 +105,9 @@ namespace :dev do
     design_1.build_layout
     design_1.layout.file = File.open("#{Rails.root}/lib/fraisier/layout.html")
     
-    design_1.layout
-    theme
-    theme_1
+    design_1.layout.save
+    theme.save
+    theme_1.save
     # image.save
     # js.save