Fixes for basic 5.0 printing support

[jvrobert]

Hi - this doesn't fix everything (and would break 4.x so that would need considered) but it does allow at least an existing, configured install of QidiPrint to work on Cura 5.0. I was able to push a print to the printer via network, but the monitoring doesn't work.

[basty2]

Hi @jvrobert, unfortunately your plugin version does not work for me. Qidi Print is displayed (in contrast to the original version), but it is an empty window afterwards and sending does not work.

[jvrobert]

To be clear, this is a very very limited patch. It only fixes (for me, at least) an existing, installed, and configured plugin. So I had the plugin working on 4.x, upgraded to 5, it broke - this lets me do the bare minimum (push a print to printer, but not monitor). Probably everything else including configuration etc.. still broken.

So if you get it working on 4.x then upgrade and apply patch it will..probably ;) work..ok..enough. I may spend a little more time on a more full fledged patch soon.