Fix empty state of subscriptions listing page - #515

Changed pages include:

• bundles/index.html - view
• customers/index.html - view
• exports/index.html - view
• gift_cards/index.html - view
• imports/index.html - view
• inventory/index.html - view
• my_sample_app/index.html - view
• orders/index.html - view
• price_lists/index.html - view
• promotions/index.html - view

There are more changes not included in the list