Problem

In #23080 a user tried to select a colorbar axes in the qt figure options and set a colormap on the pcolormesh that is used to draw the colorbar, hoping that the modification is propagated to the main axes. This doesn't work, and I'm not sure it should anyways (just like if you call set_cmap on that pcolormesh programatically?), but perhaps we can give a special label() (or other internal marker) to the pcolormesh that marks it as hidden from the qt figure options, as I don't think(?) it makes sense to change any of its properties via that interface?

Proposed solution

No response