MNT: Make useblit a property in Widget classes #30605
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The goal is to skip trying to do anything with blitting when after the figure is closed a blitting-capable Canvas instance is swapped out for one that does not support blitting.
closes #30575 but in only a partial solution to the bigger issues with blitting and changing the canvas.
PR summary
Attempts to make
useblitdynamic (and standardiizes it across all of the widget classes)Not tested with MNE's case and have not sorted out a MWE to add a test.
PR checklist