Add events with flags

[iacore]

QubesOS/qubes-issues#7231

[DemiMarie]

• Please sign your most recent commit (see the No signature found error message).
• This will require corresponding changes to the GUI daemon and agent.

[marmarek]

Are those flags actually useful for an application in the VM? It may be seen as a feature that VM has no idea whether event was emulated or not

[iacore]

Yes. Mouse wheel events are mapped as motion and emulated button presses (the amount of presses per "unit" of wheel scrolled is adjustable in Windows, there are tools for doing it for X11). Some games rely on motion events, and get insane mouse wheel speed when they can't filter emulated mouse wheel events out.

[iacore]

Maybe we don't send repeated or emulated events to client VMs, and let the client generate those events themselves? This way, each client can have different key repeat intervals.

[iacore]

• Please sign your most recent commit (see the No signature found error message).
  Thanks. I'll sign the last commit.

[iacore]

Closing, because I discovered that repeated events are not necessary as clients can generate those themselves.