Existing Values Autocomplete Widget

This module provides an autocomplete widget for text fields that suggests all existing (previously entered) values for that field. This provides more flexibility than "allowed values" for the content editor to add new values. At that same time, it is simpler in many cases than creating a taxonomy vocabulary (no hierarchies, no separate system, no permissions headaches, no rendered pages per term).

For an analysis of the different use cases for Taxonomy, Text Field with Allowed Values, and this module read this blog post.

Note: The autocomplete matching is NOT case sensitive. This means that it will match any cased version of the same characters. The suggestion will be cased like the first value in the database. If anyone needs configuration on case sensitivity, we can look into it.

Instructions
* Install & enable module per usual process.
* Visit any content type's 'Manage Form Display' page.
* Change "Textfield" widget to "Autocomplete: existing values"
* Configure how many suggestions to show in the widget configuration. (default: 15)
* Enter values in the field and they will become suggestions next time.

Roadmap Things we'd like to do if they are possible:


* Report view that can be used to find all nodes with a certain value for a specific field.
* Bulk operations on the report view to bulk edit values for a field.