This introduces a new way to define web_planners. They now take the
following form:
<template id="project_planner">
<t t-call="web_planner.pages">
<t t-call="web_planner.category">
<t t-set="menu_categorytitle" t-value="'Prepare'"/>
<t t-set="menu_categoryclasses" t-value="'fa-flag-checkered'"/>
<t t-call="web_planner.page">
<t t-set="page_title" t-value="'Welcome'"/>
<t t-set="hide_mark_as_done" t-value="True"/>
<t t-set="hide_from_menu" t-value="True"/>
<!-- content here -->
</t>
</t>
</template>
The menu is not manually created anymore, it is automatically generated.
Pages do not have to be part of a category and can just be defined as
children of web_planner.pages. A page can have hide_mark_as_done and
hide_from_menu, these are optional and will both default to False when
omitted.