[rootcanvas] fix GL canvas flicking with enabled tooltip - #23325
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When TRootCanvas shows tooltips it also call sync for X11 canvas. It should not be done for GL-based canvas. For the future it should be moved to TCanvas::Flush() method where sync of all pixmaps / doublebuffers is implemented including GL support.
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When TRootCanvas shows tooltips it also call sync for X11 canvas with mouse click event.
It should not be done for GL-based canvas.
For the future it should be moved to
TCanvas::Flush()method where sync of all pixmaps / doublebuffers is implemented including GL support.Issue exists since ever but was never observed while both GL and tooltips are disabled by default
and most probably never tested together.