dashboard: Adjust style on the select2 dropdown list.

The select2 container has a fix 20em min-width. It causes the dropdown sollapse in the table. Added 10em min-width and width 100% to scale to its content.

circle/dashboard/forms.py

@@ -1336,7 +1336,7 @@ class AclUserOrGroupAddForm(forms.Form):
     name = forms.CharField(
         widget=autocomplete.ListSelect2(
             url='autocomplete.acl.user-group',
-            attrs={'class': 'form-control',
+            attrs={'class': 'form-control access-select-width',
                    'data-html': 'true',
                    'data-placeholder': _("Name of group or user")}))
 

circle/dashboard/static/dashboard/dashboard.less

@@ -1588,3 +1588,10 @@ textarea[name="new_members"] {
     }
   }
 }
+
+.access-select-width {
+  ~ .select2-container {
+      min-width: 10em !important;
+      width: 100% !important;
+    }
+}