Fix touch screen performance drops. #624
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Every touch sample was injected individually (240-720Hz on modern panels, doubled in trackpad mode by the extra XI2 raw event), flooding the X client socket and wineserver with motion events and delaying button input. The first sample of a burst now injects immediately; follow-on samples accumulate and flush once per Choreographer frame. Pending motion always flushes before button events so clicks land at the current position. Stylus, physical mouse and gamepad paths are unchanged.
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Every touch sample was injected individually (240-720Hz on modern panels, doubled in trackpad mode by the extra XI2 raw event), flooding the X client socket and wineserver with motion events and delaying button input. The first sample of a burst now injects immediately; follow-on samples accumulate and flush once per Choreographer frame. Pending motion always flushes before button events so clicks land at the current position. Stylus, physical mouse and gamepad paths are unchanged.