[FIX] base: widget duration - allow to round to avoid seconds

Allow to round the duration to a minimal unit.

Eg:
   0.33 hour = 19.8 min = "19 minutes 48 seconds"
   if option {'widget'='duration', 'unit'='hour', 'round'='minute'}
   0.33 hour => 20 min = "20 minutes"

addons/website_event_track/models/event.py

@@ -45,7 +45,7 @@ class event_track(models.Model):
         'Status', default='draft', required=True, copy=False, track_visibility='onchange')
     description = fields.Html('Track Description', translate=True)
     date = fields.Datetime('Track Date')
-    duration = fields.Float('Duration', digits=(16, 2), default=1.5)
+    duration = fields.Float('Duration', default=1.5)
     location_id = fields.Many2one('event.track.location', 'Room')
     event_id = fields.Many2one('event.event', 'Event', required=True)
     color = fields.Integer('Color Index')

addons/website_event_track/views/website_event.xml

@@ -249,7 +249,7 @@
                             <b>Date</b><br/>
                             <span t-field="track.date" t-field-options='{"hide_seconds":"True"}'/><br/>
                             <b>Duration</b><br/>
-                            <span t-field="track.duration" t-field-options="{&quot;widget&quot;: &quot;duration&quot;, &quot;unit&quot;: &quot;hour&quot;}"/><br/>
+                            <span t-field="track.duration" t-field-options='{"widget": "duration", "unit": "hour", "round": "minute"}'/><br/>
                             <b>Location</b><br/>
                             <span t-field="track.location_id"/><br/>
                         </div>

openerp/addons/base/ir/ir_qweb.py

@@ -942,7 +942,12 @@ class DurationConverter(osv.AbstractModel):
         factor = units[options['unit']]
 
         sections = []
+
         r = value * factor
+        if options.get('round') in units:
+            round_to = units[options['round']]
+            r = round(r / round_to) * round_to
+
         for unit, secs_per_unit in TIMEDELTA_UNITS:
             v, r = divmod(r, secs_per_unit)
             if not v: continue