Maximize new windows by default

[OR555]

This is more of a pull request, I suggest modifying the window creation process to open new windows in a maximized state by default.
For example in incognito, go toservice_worker.js and modify {incognito: true} to: {incognito: true, state: "maximized"}, this should allow private windows to open in a maximized state.

Please consider applying this change to all shortcuts that open new windows.
Thanks for listening and for this awesome extension!