Single field entity form

This module provides an entity form which only contains one field widget. It is an API only module, however an implementation for the metatags field is provided as a sub module. In practice this means enabling the metags_only_entity_form module adds a "meta tags" local task (tab) to entity forms which contain only the metatags firehose widget.

Features

Similar functionality could be achieved from the field UI by adding a custom form mode and configuring it appropriately -- this module does that but the module also:

1. provides a new local task (tab) per field
2. integrates with field level access control
3. provides a clean form -- some code does not use widgets rather just alters the entity form. (This is done on a best effort basis, a completely new form would take too much code)
4. automatically works with new entity bundles (like adding a new node type or taxonomy vocabulary)