ticket:227 added get_all_ids function to wsapi
ticket:227 reworked cart_add_files to add all ids to cart immediately and then execute tasks
ticket:227 improved get_all_ids, added tests
ticket:228 download missed attributes when showing cart page
ticket:228 added test for check_missing_files
ticket:228 fixed get_all_ids
ticket:229 show spinner when waiting for answer after press on add_to_cart
ticket:229 set cart_loading flag in session for while data not fully loaded
ticket:229 disable some controls and show alert on cart page
ticket:229 edited howitworks.rst
Merge branch 't229_disable_some_controls_and_show_message_when_attributes_still_loading_to_cart'
ticket:229 use DATE_ATTRIBUTE from attributes file