1)
What will be the difference between

`dbus-launch pcmanfm -d`

and

`pcmanfm -d` ?

(I remember, there was an issue with thunar not mounting automatically
usb devices, which could be solved using the dbus-launch command).

2)
Is anyone aware of a way how to make pcmanfm use udevil?

(I tried spacefm but unfortunately it is way way less straight in
dealing with freedesktop definitions: There are no equivalents (at
least no easy ones, i found some hacks, but ... ) to the commands
`pacmanfm menu://applications/`, `pcmanfm computer:///` and `pcmanfm
Trash:///` ).

Thanks a lot in advance for any pointer.