Show the desktop shell in Chinese under zh_CN

shell/plugins/clipboard/Clipboard.qml

@@ -398,8 +398,8 @@ Item {
           anchors.fill: parent
           opened: root.clearConfirmOpen
           z: 10
-          message: "Delete entire clipboard history?"
-          confirmText: "Delete"
+          message: I18n.tr("Delete entire clipboard history?")
+          confirmText: I18n.tr("Delete")
           background: root.background
           foreground: root.foreground
           scrim: root.scrim
@@ -592,7 +592,7 @@ Item {
 
             Text {
               textFormat: Text.PlainText
-              text: root.history.length === 0 ? "Clipboard is empty" : "No matches for “" + root.filterText + "”"
+              text: root.history.length === 0 ? I18n.tr("Clipboard is empty") : I18n.tr("No matches for “%1”", root.filterText)
               color: root.foreground
               opacity: 0.7
               font.family: root.fontFamily