Convert the title calculation into a template tag

Convert the calculate form title template into a template tag.
The result of the template tag is applied as the title property
of the <H3> HTML tag allowing users to view the full title on
mouse hover if the title was truncated.

Signed-off-by: Roberto Rosario <Roberto.Rosario@mayan-edms.com>

mayan/apps/common/classes.py

@@ -4,7 +4,6 @@ import hashlib
 
 from django.apps import apps
 from django.db import models
-from django.template import loader
 from django.template.response import TemplateResponse
 from django.urls import reverse
 from django.utils.encoding import force_text, python_2_unicode_compatible