applets/clipboard: Use the phrase "QR code" in the QR code action

This action generates a QR code, but refers to it as a barcode in the UI
strings. In English at least, this is confusing; barcodes and QR codes
are different things, rather than one being a subset of the other. So
let's change the base English text to call the generated image a QR
code rather than a barcode. Any other language where the translation
for "barcode" is appropriate can substitute that in the translated text.

applets/clipboard/contents/ui/BarcodePage.qml

@@ -74,7 +74,7 @@ ColumnLayout {
                 onClicked: menu.openRelative()
 
                 PlasmaComponents3.ToolTip {
-                    text: i18n("Change the barcode type")
+                    text: i18n("Change the QR code type")
                 }
             }
         }
@@ -98,7 +98,7 @@ ColumnLayout {
             anchors.fill: parent
             horizontalAlignment: Text.AlignHCenter
             verticalAlignment: Text.AlignVCenter
-            text: i18n("Creating barcode failed")
+            text: i18n("Creating QR code failed")
             wrapMode: Text.WordWrap
             visible: barcodeItem.implicitWidth === 0 && barcodeItem.implicitHeight === 0
         }
@@ -107,7 +107,7 @@ ColumnLayout {
             anchors.fill: parent
             horizontalAlignment: Text.AlignHCenter
             verticalAlignment: Text.AlignVCenter
-            text: i18n("The barcode is too large to be displayed")
+            text: i18n("The QR code is too large to be displayed")
             wrapMode: Text.WordWrap
             visible: barcodeItem.implicitWidth > barcodeItem.width || barcodeItem.implicitHeight > barcodeItem.height
         }

applets/clipboard/contents/ui/DelegateToolButtons.qml

@@ -30,7 +30,7 @@ RowLayout {
         onClicked: menuItem.barcode(DisplayRole)
 
         PlasmaComponents3.ToolTip {
-            text: i18n("Show barcode")
+            text: i18n("Show QR code")
         }
     }
     PlasmaComponents3.ToolButton {