Provide launch context to apps when launched through FriendShell

[steffest]

Situation:
If have installed an app "MyApp" that can open certain files.
in FriendShell I navigate to the folder where the file is that I want to open.
I execute the command "launch MyApp myfile.txt"
MyApp launches and has "myfile.txt" as argument, but can't open it because it doesn't now the path to myfile.txt.

Proposed solution: provide the context to the application from where it was launched.