Decouple Tenant class
Forward form to wtih_branch.php using session
Can fetch input from table
move drop_down_menu to ElementFactory class
Implement selector tool
refresh table when add or remove
Include input field in table
Fix form not submit to server
Show/hide submit button
Filter out already added branch
Add new_content.php
when submit go to page new_content.php instead
Implement  Record Interface in Form class
Implement new_content.php
Fix inclusion error
Remove unused class 'Table' (using javascript instead)
Implement Priv_branch insertion to database
Fix session
save input values to itself when fetch
Fix problem of failure on inserting record in Tenant_branch table