extend text char limits to match other app stores

extend text char limits to match other app stores

We should be compatible with other apps stores unless there is a specific
reason not to be.

* Google Play, Amazon, and iTunes all have 4000 char descriptions

For the summary, we can just bump it up to the same as what Play has
* Google Play allows an 80 char "Short Description"
  https://support.google.com/googleplay/android-developer/answer/113469?hl=en
* Amazon allows a 1200 char "Short Description"
  https://developer.amazon.com/public/support/submitting-your-app/tech-docs/submitting-your-app#Add Metadata and Image Assets