Clean-up and rename variables

Gui/AddCustomer.qml

@@ -90,7 +90,7 @@ ColumnLayout
                 onCurrentTextChanged: isEmptyField()
                 onEditTextChanged: isEmptyField()
                 onActivated: currentValue
-                model: am
+                model: address_model
                 textRole: "display"
                 popup.height: 300
                 popup.y: postcode.y + 5 - (postcode.height * 2)
@@ -111,7 +111,7 @@ ColumnLayout
                 editable: true
                 onEditTextChanged: isEmptyField()
                 onCurrentTextChanged: isEmptyField()
-                model: am
+                model: address_model
                 textRole: "city"
                 popup.height: 300
                 popup.y: postcode.y + 5 - (postcode.height * 2)
@@ -189,7 +189,7 @@ ColumnLayout
                 id: typeid
                 Layout.fillWidth: true
                 editable: false
-                model: btm
+                model: business_type
                 textRole: "display"
             }
             Label