[IMP] web_kanban: changed the down arrow to a pencil
[IMP] propagated new kanban dropdown menu icon to modules that used it
Merge branch 'master-onboarding-web_kanban-dmo' of github.com:odoo-dev/odoo into master-onboarding-web_kanban-dmo

Conflicts:
	addons/web_kanban/static/src/css/kanban.css