#101 Team sharing tests

* adds tests for team sharing
* extends the API for team sharing support
* adds shared_teams property shortcut for ShareableObjectMixin
* adds full support for team-based sharing to all views and functions
* simplifies ShareModalForm
* adds/updates translations

konova/filters/mixins.py

@@ -297,8 +297,9 @@ class ShareableTableFilterMixin(django_filters.FilterSet):
         """
         if not value:
             return queryset.filter(
-                users__in=[self.user],  # requesting user has access
-            )
+                Q(users__in=[self.user]) |  # requesting user has access
+                Q(teams__users__in=[self.user])
+            ).distinct()
         else:
             return queryset