[Feature Request] set transparency only for non-focused areas

## Requirements for Contributing

* [x] I have read the [Contributing Guidelines](https://github.com/danthe1st/.github/blob/master/CONTRIBUTING.md)
* [x] I am asking for a feature in this issue.
* [ ] I have not been able to find any other issues describing my problem

## Describe the solution you'd like
It would be nice to add the following checkbox to the settings page:

`(x) If enabled, only non-focused areas are transparent.`

For example, if the user focuses/tap in the editor (= the active focused area), no transparency should be set for that area. All other non-focused areas remain transparent according to the setting.

Would this be possible?