Render: Provide option for specifying prefix and suffix

Problem/Motivation

When rendering an element using any ECA Render action, it may be useful to specify a prefix and a suffix as string. Basically known as "#prefix" and "#suffix" in common renderable arrays.

Steps to reproduce

Proposed resolution

Add these two options to any render plugin that adds a render element.

Remaining tasks

User interface changes

API changes

Data model changes