feat: live printing bed mesh changes

[pedrolamas]

This a considerable refactor of Bed Mesh in Fluidd and will need further testing, but brings the following major changes:

• Bed mesh profiles are now retrieved from printer.bed_mesh.profiles object instead of config settings (reason being that this object is "live" updated, but the config never changes)
• Bed mesh profiles can be loaded/cleared/changed while printer is printing (I see no reason to not allow this if Klipper allows for it), calibration and homing will still be disabled if printer is busy.
• Bed mesh save/delete will NOT restart the printer (it will instead show the "SAVE CONFIG AND RESTART" button on top and wait for user confirmation - all translations have been updated accordingly!

Note: this might be easier to review with "hide whitespace" option enabled!

[matmen]

LGTM, but are the buttons (clear profile, delete profile) enabled while printing intentionally now? Not sure what the side effects of deleting a profile while printing would be..

[pedrolamas]

All good points, I've been giving some though on this for the last couple of days!

Starting on delete, once a bed mesh is loaded into memory, the profile can be deleted and the mesh data will remain in memory, so deleting a profile while printing has zero impact on the active print.

Now loading or clearing a profile while printing will impact the active print. I agree that a simple click as it currently is might not be appropriate... so maybe show a confirmation message for clear/load if state printing?

[pedrolamas]

I've now added confirmation dialogs for mesh load/clear if printer printing (no confirmation dialog is shown if printer is paused, I see no reason for that as there is no big impact anyway).

[matmen]

LGTM!