ABL selection before printing

[boromyr]

Hi, for a while now I've been thinking about a new pop-up page before each print, that lets you choose whether to start automatic levelling before each print.

Describe the solution you'd like Often when printing small objects, like the calibration cube, the ABL is not of much use, especially when the Object is printed in the center, it wastes time and may make the first layer worse. By removing G29 from the startup script, it can be sent directly from the screen in case of confirmation.

Additional context This idea is mainly useful in the case of bilinear leveling, for those using UBL it could be used to load the default saved mesh, or choose not to load it. Alternatively, you could start G29 J3 to align the mesh saved in memory.