Make global justMyCode for python debugger

[rain1]

When I debug python code I often need "justMyCode":false It's annoying if I have to create launch.json every time because I often don't have project but rather just a single file. I would prefer if there was global "justMyCode":false option. so I don't have to create a launch.json every time.

[karthiknadig]

@rain1 There is already a setting for this: