Add support for multiple dashboards.

Add support for removing dashboard widgets.

Signed-off-by: Roberto Rosario <roberto.rosario.gonzalez@gmail.com>

mayan/apps/checkouts/dashboard_widgets.py

@@ -0,0 +1,21 @@
+from __future__ import absolute_import, unicode_literals
+
+from django.apps import apps
+from django.urls import reverse_lazy
+from django.utils.translation import ugettext_lazy as _
+
+from common.classes import DashboardWidget
+
+
+def checkedout_documents_queryset():
+    DocumentCheckout = apps.get_model(
+        app_label='checkouts', model_name='DocumentCheckout'
+    )
+    return DocumentCheckout.objects.all()
+
+
+widget_checkouts = DashboardWidget(
+    label=_('Checkedout documents'),
+    link=reverse_lazy('checkouts:checkout_list'),
+    icon='fa fa-shopping-cart', queryset=checkedout_documents_queryset
+)