[IMP] website_event, *: refactor website events layouts

* base, portal, website, website_event_sale, website_event_track

- The previous event registration form was not clear on mobile

- Review some layouts to match the new design general idea, using cards
  (see forum refactoring of https://github.com/odoo/odoo/pull/29235)

- Use correct bootstrap components (like a menu instead of a breadcrumb
  on event pages)

- Review options to be able to disable the left / right column and
  choose the exact options you want to appear in them

task-1858034

closes odoo/odoo#30559

1 files changed, 13 insertions, 0 deletions

diff --git a/addons/website_event/static/src/scss/website_event.scss b/addons/website_event/static/src/scss/website_event.scss
new file mode 100644
index 00000000000..05c436a140a
--- /dev/null
+++ b/addons/website_event/static/src/scss/website_event.scss
@@ -0,0 +1,13 @@
+.o_wevent_participating_container {
+    position: relative;
+
+    &::before {
+        content: "";
+        @include o-position-absolute(0, auto, 0, 0);
+        width: 3px;
+        background-color: theme-color('info');
+    }
+}
+.o_wevent_registration_list_attendees:nth-child(2n) {
+    background-color: gray('200');
+}