[IMP] base_setup: Improve the `General Settings` form view

addons/fetchmail/views/fetchmail_views.xml

addons/google_calendar/models/res_config.py

addons/google_calendar/static/src/img/setup_01.png

addons/google_calendar/static/src/img/setup_03.png

addons/google_calendar/static/src/img/setup_04.png

addons/google_calendar/static/src/img/setup_05.png

addons/google_calendar/static/src/img/setup_06.png

addons/google_calendar/static/src/img/setup_07.png

addons/google_calendar/static/src/img/setup_08.png

addons/google_calendar/static/src/img/setup_09.png

addons/google_calendar/static/src/img/setup_10.png

addons/google_calendar/views/res_config_views.xml

addons/google_drive/views/res_config_views.xml

addons/google_spreadsheet/__manifest__.py

...s/google_spreadsheet/views/base_config_settings_views.xml

addons/mail/views/res_config_views.xml

addons/pad/views/res_config_view.xml

addons/product/views/base_config_settings_views.xml

addons/report/models/base_config_settings.py

addons/report/views/base_config_settings_views.xml