Add commerce_deposit_place_button_on_form() and commerce_deposit_button(), and change commerce_deposit_form_commerce_cart_add_to_cart_form_alter() to use them.

Add commerce_deposit_form_commerce_product_ui_product_form_alter() and commerce_deposit_commerce_product_ui_product_form_validate() to prevent deposit amounts greater than or equal to the product price.

Change commerce_deposit_balance_generate_order() to use the order id from the query string, if it is present. Change commerce_deposit_balance_line_item_add_form() to prevent non saved orders, and anonymous orders from processing. Remove half implemented functionality from commerce_deposit_balance_line_item_add_form_submit() and instead direct the admin to use the user's deposit listing form.

Remove commerce_deposit_line_item_new() and change commerce_deposit_line_item_add_form() and commerce_deposit_line_item_add_form_submit() to only work with a saved order.

Remove commerce_deposit_entity_view(). Remove commerce_deposit_order_status_changed(). Add commerce_deposit_balance_paid field and instance to deposit line item type. Change commerce_deposit_commerce_order_presave() to watch for orders moving between pre and post states, then any balances being paid, have their corresponding deposit's balance marked as paid or not.

Add commerce_deposit_line_item_types_present_on_order() and commerce_deposit_order_status_changed() and implement commerce_deposit_commerce_order_presave().

Add commerce_deposit_form_views_form_commerce_cart_form_default_alter() and commerce_deposit_line_item_delete_form_submit(). Change commerce_deposit_balance_generate_order() to redirect user to cart or admin order UI depending on the user's context. Implemented commerce_deposit_balance_line_item_title(). Add isset() checks to commerce_deposit_commerce_cart_empty_block() and commerce_deposit_commerce_cart_empty_page().

Add commerce_deposit_balance_generate_order() and change the empty cart theme overrides to support balances as well.

Add commerce_deposit_views_data() and change commerce_deposit_views_query_alter() to support the commerce_line_item_table view and dynamically support our cusotm line item types.

Alter the page callback on checkout to our custom function, which then includes our custom line item types in the quantity.

Adjust theme registry alteration functions to use the default Commerce Views now that we're using the alter query hook.

Change commerce_deposit_views_query_alter() to iterate over all where conditions when looking to append our custom line item types.

Users can now add deposits to a cart, and the empty cart block and page consider deposit line items when rendering.