CharWidget optimisations

[matthewhegarty]

Problem

CharWidget did not appear in resources.WIDGET_MAP - this is not an issue because the functionality of CharWidget is equivalent to Widget. However this does mean that there is a redundant method in CharWidget which I have removed.

Solution

• Updated WIDGETS_MAP to return CharWidget for CharField for consistency.
• Removed redundant method render() from CharWidget (it is equivalent to the Widget method)

Acceptance Criteria

• Added tests

[pokken-magic]

I don't see any issues with this or why it wouldn't pass tests. Appreciate you adding Charwidget to the map, I'll close that discussion item out :)