Allow edition in the new UI

This make everything slow as hell and prevent to quickly save.

Example: <h2 class="foo">bar</h2> => <h3 class="foo">bar</h3>

Try to get the cropper options from previous device ID

erp5_user_tutorial_ui_test: dependency on erp5_accounting was missing (account_module).

runUnitTest: log_directory is imported from Unit Tests and thus must be global to avoid pylint error.

See merge request nexedi/erp5!1251

1. set 0 as default value, otherwise leaflet_display_side will always be true
2. show message instead of crash
3. correct parameters
4. clean code