feature request: "always-fullscreen" for preferred apps in freeform mode

[futurk]

for me, some apps are always used in fullscreen like Open Camera and Bromite Web Browser. i have to tap the maximize (actually: fullscreen) button of the window every time. it'd be really convenient to have an option to set those apps to open in fullscreen every time.

[utzcoz]

@farmerbb Maybe we can create a page in setting for user to set specific app default windowing mode to fullscreen, looks like official settings app list page.