Multi-Hotend Preheat Fixes

[thisiskeithb]

Description

Return to Status Screen after using "Preheat (material) All" menu on multi-hotend setups and fix bed preheat with @rhapsodyv's fix below.

Benefits

Return to Status Screen similar to how preheating with a single extruder currently works and preheat the bed when selecting "Preheat (material) All".

Configurations

Use configs from #20163/any multi-hotend setup.

Related Issues

#20163

[rhapsodyv]

I think I missed something, in a first view. MSG_PREHEAT_M_ALL call _preheat_bed, that call lcd_preheat, that calls ui.return_to_status().
So, if the user have a HAS_HEATED_BED, it should get back to information screen.

Maybe the fix is use the complete TERN(HAS_HEATED_BED, []{ _preheat_bed(editable.int8); }, ui.return_to_status()); and call it after the HOTEND_LOOP.

[rhapsodyv]

It is a little more strange. TERN_(HAS_HEATED_BED, []{ _preheat_bed(editable.int8); }); just declare a lamba, and don't call it ... I'm almost sure that it won't will heat the bed!

I think the fix is:

        ACTION_ITEM_S(ui.get_preheat_label(m), MSG_PREHEAT_M_ALL, []() {
          HOTEND_LOOP() thermalManager.setTargetHotend(ui.material_preset[editable.int8].hotend_temp, e);
          TERN(HAS_HEATED_BED, _preheat_bed(editable.int8), ui.return_to_status());
        });