Fixed position header + footer for modals

- Fun with CSS!
- Header title provided by AJAX data
- Footer static
- Submit button text can be customized via JSON dat

InvenTree/InvenTree/views.py

@@ -23,12 +23,13 @@ class AjaxView(object):
 
     def renderJsonResponse(self, request, form, data={}):
 
-        context = {'form': form,
-                   'form_action': self.ajax_form_action,
-                   'form_title': self.ajax_form_title,
-                   'submit_text': self.ajax_submit_text,
+        context = {'form': form
                   }
 
+        data['title'] = self.ajax_form_title
+
+        data['submit_text'] = self.ajax_submit_text
+
         data['html_form'] = render_to_string(
             self.getAjaxTemplate(),
             context,