feature: attach window to menu bar for Webkit engine

[gingerr]

Feature Request

Specifications:

• App Version: 1.3.0
• OS: macOS

Description:
First of all, thank you very much for realizing and offering this OpenSource alternative to Apps like Unite which can't be used in an enterprise context. In Webcatalog you offer the feature to 'attach window to menu bar'. Is this feature here also possible and if yes, is it on the roadmap?

I am not sure if this is the right place for this feature request or if its better placed in the webkit-wrapper repository.

Thank you.