Allow negative values for nozzle offsets and print head shape

That's half of the point of these settings, anyway.

Fixes #5784.

plugins/MachineSettingsAction/MachineSettingsExtruderTab.qml

@@ -107,6 +107,7 @@ Item
                 labelWidth: base.labelWidth
                 controlWidth: base.controlWidth
                 unitText: catalog.i18nc("@label", "mm")
+                allowNegativeValue: true
                 forceUpdateOnChangeFunction: forceUpdateFunction
             }
 
@@ -121,6 +122,7 @@ Item
                 labelWidth: base.labelWidth
                 controlWidth: base.controlWidth
                 unitText: catalog.i18nc("@label", "mm")
+                allowNegativeValue: true
                 forceUpdateOnChangeFunction: forceUpdateFunction
             }
 

plugins/MachineSettingsAction/MachineSettingsPrinterTab.qml

@@ -191,6 +191,7 @@ Item
 
                 axisName: "x"
                 axisMinOrMax: "min"
+                allowNegativeValue: true
 
                 forceUpdateOnChangeFunction: forceUpdateFunction
             }
@@ -209,6 +210,7 @@ Item
 
                 axisName: "y"
                 axisMinOrMax: "min"
+                allowNegativeValue: true
 
                 forceUpdateOnChangeFunction: forceUpdateFunction
             }
@@ -227,6 +229,7 @@ Item
 
                 axisName: "x"
                 axisMinOrMax: "max"
+                allowNegativeValue: true
 
                 forceUpdateOnChangeFunction: forceUpdateFunction
             }
@@ -247,6 +250,7 @@ Item
 
                 axisName: "y"
                 axisMinOrMax: "max"
+                allowNegativeValue: true
 
                 forceUpdateOnChangeFunction: forceUpdateFunction
             }