use PlasmaComponents3.ComboBox at settings window

shell/package/contents/configuration/AppearanceConfig.qml

@@ -26,6 +26,7 @@ import QtQuick.Dialogs 1.2
 
 import org.kde.plasma.core 2.0 as PlasmaCore
 import org.kde.plasma.components 2.0 as PlasmaComponents
+import org.kde.plasma.components 3.0 as PlasmaComponents3
 import org.kde.plasma.plasmoid 2.0
 
 import org.kde.latte 0.1 as Latte
@@ -67,7 +68,7 @@ PlasmaComponents.Page {
                 Layout.rightMargin: units.smallSpacing * 2
                 spacing: units.smallSpacing
 
-                PlasmaComponents.ComboBox {
+                PlasmaComponents3.ComboBox {
                     id: layoutCmb
                     Layout.fillWidth: true
 

shell/package/contents/configuration/BehaviorConfig.qml

@@ -25,6 +25,7 @@ import QtGraphicalEffects 1.0
 
 import org.kde.plasma.core 2.0 as PlasmaCore
 import org.kde.plasma.components 2.0 as PlasmaComponents
+import org.kde.plasma.components 3.0 as PlasmaComponents3
 import org.kde.plasma.plasmoid 2.0
 
 import org.kde.latte 0.1 as Latte
@@ -188,7 +189,7 @@ PlasmaComponents.Page {
                     Layout.alignment: Qt.AlignRight
                 }
 
-                PlasmaComponents.ComboBox {
+                PlasmaComponents3.ComboBox {
                     id: screenCmb
                     Layout.fillWidth: true
                     Component.onCompleted: screenRow.updateScreens();

shell/package/contents/configuration/LatteDockConfiguration.qml

@@ -26,6 +26,7 @@ import QtQuick.Window 2.2
 
 import org.kde.plasma.core 2.0 as PlasmaCore
 import org.kde.plasma.components 2.0 as PlasmaComponents
+import org.kde.plasma.components 3.0 as PlasmaComponents3
 import org.kde.plasma.extras 2.0 as PlasmaExtras
 import QtQuick.Controls.Styles.Plasma 2.0 as Styles
 
@@ -366,7 +367,7 @@ FocusScope {
                 Layout.fillWidth: true
                 text:" "
 
-                PlasmaComponents.ComboBox {
+                PlasmaComponents3.ComboBox {
                     id: actionsCmb
                     anchors.fill: parent
                     enabled: addDock.enabled

shell/package/contents/configuration/TasksConfig.qml

@@ -24,6 +24,7 @@ import QtGraphicalEffects 1.0
 
 import org.kde.plasma.core 2.0 as PlasmaCore
 import org.kde.plasma.components 2.0 as PlasmaComponents
+import org.kde.plasma.components 3.0 as PlasmaComponents3
 import org.kde.plasma.plasmoid 2.0
 
 import org.kde.latte 0.1 as Latte
@@ -169,7 +170,7 @@ PlasmaComponents.Page {
                     Layout.alignment: Qt.AlignRight
                 }
 
-                PlasmaComponents.ComboBox {
+                PlasmaComponents3.ComboBox {
                     id: middleClickAction
                     Layout.fillWidth: true
                     model: [i18nc("The click action", "None"), i18n("Close Window or Group"),
@@ -185,7 +186,7 @@ PlasmaComponents.Page {
                 spacing: units.smallSpacing
                 visible: plasmoid.configuration.advanced
 
-                PlasmaComponents.ComboBox {
+                PlasmaComponents3.ComboBox {
                     id: modifier
                     Layout.maximumWidth: theme.mSize(theme.defaultFont).width * 5
                     model: ["Shift", "Ctrl", "Alt", "Meta"]
@@ -198,7 +199,7 @@ PlasmaComponents.Page {
                     text: "+"
                 }
 
-                PlasmaComponents.ComboBox {
+                PlasmaComponents3.ComboBox {
                     id: modifierClick
                     Layout.maximumWidth: theme.mSize(theme.defaultFont).width * 10
                     model: [i18n("Left Click"), i18n("Middle Click"), i18n("Right Click")]
@@ -211,7 +212,7 @@ PlasmaComponents.Page {
                     text: "="
                 }
 
-                PlasmaComponents.ComboBox {
+                PlasmaComponents3.ComboBox {
                     id: modifierClickAction
                     Layout.fillWidth: true
                     model: [i18nc("The click action", "None"), i18n("Close Window or Group"),