Before this commit, when we set the activity type to 'todo' in our project, the
default action was set to 'none.' This configuration made the 'todo' category
type less intuitive and less useful.
In this commit, we have improved the default behavior. Now, when you select the
'todo' category type, it will automatically have the 'reminder' action assigned
by default. This change enhances user experience and ensures that 'todo' items
have a meaningful default action.
task-3500700
closesodoo/odoo#135767
Signed-off-by: Xavier Bol (xbo) <xbo@odoo.com>