Implement assign_remove view's form submit icon substitution

apps/common/icons.py

@@ -1,7 +1,7 @@
 from __future__ import absolute_import
 
 from icons.literals import (CROSS, TICK, COMPUTER_KEY, VCARD, VCARD_EDIT,
-    INFORMATION, SCRIPT, KEYBOARD)
+    INFORMATION, SCRIPT, KEYBOARD, ADD, DELETE)
 from icons import Icon
 
 icon_cross = Icon(CROSS)
@@ -13,3 +13,5 @@ icon_current_user_edit = Icon(VCARD_EDIT)
 icon_about = Icon(INFORMATION)
 icon_license = Icon(SCRIPT)
 icon_admin_site = Icon(KEYBOARD)
+icon_add = Icon(ADD)
+icon_delete = Icon(DELETE)

apps/common/views.py

@@ -18,6 +18,7 @@ from django.conf import settings
 from .forms import (ChoiceForm, UserForm, UserForm_view, LicenseForm,
     EmailAuthenticationForm)
 from .settings import LOGIN_METHOD
+from .icons import icon_add, icon_delete
 
 
 def multi_object_action_view(request):
@@ -134,7 +135,7 @@ def assign_remove(request, left_list, right_list, add_method, remove_method, lef
                     'form': unselected_list,
                     'title': left_list_title,
                     'submit_label': _(u'Add'),
-                    'submit_icon_famfam': 'add'
+                    'submit_icon': icon_add
                 }
             },
             {
@@ -145,7 +146,7 @@ def assign_remove(request, left_list, right_list, add_method, remove_method, lef
                     'form': selected_list,
                     'title': right_list_title,
                     'submit_label': _(u'Remove'),
-                    'submit_icon_famfam': 'delete'
+                    'submit_icon': icon_delete
                 }
             },