[IMP] website: support add_direction in duration qweb widget

RATIONALE

Events are sometimes held online, gathering a community. In this merge we
improve Event application to better support full-online events with improved
tracks, wishlists, chat rooms, ...

PURPOSE

Prepare Event Online support by providing fixes in registration and event
frontend flows. Also provide a quick back2basic in backend views to prepare
addition of Online sub modules.

SPECIFICATIONS

Allow to give add_direction to duration widget, propagated to babel formatting.
See babel for any information about its use.

LINKS

Community PR odoo/odoo#55197
Enterprise PR odoo/enterprise#12113

Task ID-2309702 (Event Preparatory Merge 4)
Prepares Task ID-2252655 (Main Online Event task)

odoo/addons/base/models/ir_qweb_fields.py

@@ -528,6 +528,11 @@ class DurationConverter(models.AbstractModel):
                 description=_("Formatting: long, short, narrow (not used for digital)"),
                 default_value='long'
             ),
+            add_direction=dict(
+                type="boolean",
+                string=_("Add direction"),
+                description=_("Add directional information (not used for digital)")
+            ),
         )
         return options
 
@@ -566,7 +571,12 @@ class DurationConverter(models.AbstractModel):
             if not v:
                 continue
             section = babel.dates.format_timedelta(
-                v*secs_per_unit, format=options.get('format', 'long'), threshold=1, locale=locale)
+                v*secs_per_unit,
+                granularity=round_to,
+                add_direction=options.get('add_direction'),
+                format=options.get('format', 'long'),
+                threshold=1,
+                locale=locale)
             if section:
                 sections.append(section)