Improve configuration change detection

[kaisalmen]

Fixes #46

The configuration change detection in componentDidUpdate is not correct. It interprets model related updates as application configuration updates. This PR introduces better logic to the wrapper and thereby shortens the react-component code.

There are now three levels of update protection:

• It is checked if the editor app config is changed
• It is checked if only the code or if the model changed

[montymxb]

General feedback points. There's a large conditional that's built in editorAppBase.ts that can probably be expressed as a series of branches or [a,b,c].some(p => p).

[montymxb]

approved!