Fix of #1512 "Printer Host Upload Queue vanishes in the background [1.42.0-alpha1]" the canvas3d used to grab focus when mouse entered a window even if the top level window was not active. This was now changed and the top level must be active for the canvas3d to grab the focus.
Fix of #1512
"Printer Host Upload Queue vanishes in the background [1.42.0-alpha1]"
the canvas3d used to grab focus when mouse entered a window even
if the top level window was not active. This was now changed and
the top level must be active for the canvas3d to grab the focus.

prusa3d/Slic3r,prusa3d/Slic3r,prusa3d/Slic3r,prusa3d/Slic3r,prusa3d/Slic3r,prusa3d/Slic3r,prusa3d/Slic3r