Consolidate TextField override widgets to minimize code duplication across several themes

[heath-freenome]

Prerequisites

• I have read the documentation;
• In the case of a bug report, I understand that providing a SSCCE example is tremendously useful to the maintainers.
• Ideally, I'm providing a sample JSFiddle or a shared playground link demonstrating the issue.

Description

The bootstrap-4, fluent-ui and material-ui themes all override TextWidget for many of the other input based widgets (i.e. UrlWidget, EmailWidget, etc...). The antd and semantic themes could also use the exact same pattern for some of the input based widgets as well where the only difference in code is the type. The core implementation has a BaseInput which is used for exactly the same pattern in use by the other themes. It probably makes sense from a DRY code perspective to remove as much of the duplicate code and rely on the underlying core implementation where possible. This is a big refactor. I volunteer to take it on... one theme at a time until it is done.

Version

v3.x

[heath-freenome]

@epicfaace Here is the issue

[heath-freenome]

Fixed in the v5 beta, see the 5.x migration guide