QmlDesigner.propertyEditor: add missing qsTr()

share/qtcreator/qmldesigner/propertyeditor/Qt/StandardTextGroupBox.qml

@@ -25,7 +25,7 @@ GroupBox {
             visible: showIsWrapping
             layout: HorizontalLayout {
                 Label {
-                    text: "Wrap Mode"
+                    text: qsTr("Wrap Mode")
                 }
                 ComboBox {
                     baseStateFlag: isBaseState

share/qtcreator/qmldesigner/propertyeditor/Qt/Switches.qml

@@ -18,7 +18,7 @@ QFrame {
             checkable: true;
             checked: true;
             id: standardMode;
-            toolTip: qsTr(""special properties");
+            toolTip: qsTr("special properties");
             //iconFromFile: "images/rect-icon.png";
             text: backendValues === undefined || backendValues.className === undefined || backendValues.className == "empty" ? "empty" : backendValues.className.value
             onClicked: {

share/qtcreator/qmldesigner/propertyeditor/Qt/TextInputGroupBox.qml

@@ -26,7 +26,7 @@ GroupBox {
             visible: isTextInput
             layout: HorizontalLayout {
 
-                Label {text: "Echo Mode"}
+                Label {text: qsTr("Echo Mode") }
 
                 ComboBox {
                     baseStateFlag: isBaseState

share/qtcreator/qmldesigner/propertyeditor/Qt/emptyPane.qml

@@ -35,7 +35,7 @@ PropertyFrame {
                             bottomMargin: 2;
                             QLabel {
                                 minimumHeight: 20;
-                                text: "none or multiple items selected";
+                                text: qsTr("none or multiple items selected");
                                 alignment: "AlignHCenter";
                             }
                         }