gui-agent: switch to automatic composition mode, fix in-vm screenshots #52
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For in-vm screenshots (including screen sharing etc) to work, window composition buffers needs to be rendered back to root window. Using "automatic" composition mode does that. Since it may have noticeable performance impact, add an option to disable it. Fixes QubesOS/qubes-issues#4351
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For in-vm screenshots (including screen sharing etc) to work, window
composition buffers needs to be rendered back to root window. Using
"automatic" composition mode does that.
Fixes QubesOS/qubes-issues#4351