Make the disabled text translatable

Contributes to CURA-5941.

resources/qml/ExpandableComponent.qml

@@ -109,7 +109,7 @@ Item
             anchors.fill: parent
             leftPadding: background.padding
             rightPadding: background.padding
-            text: "This component is disabled"
+            text: catalog.i18nc("@label default disabled text", "This component is disabled")
             font: UM.Theme.getFont("default")
             renderType: Text.NativeRendering
             verticalAlignment: Text.AlignVCenter

resources/qml/ExpandableComponentHeader.qml

@@ -24,7 +24,7 @@ Cura.RoundedRectangle
     Label
     {
         id: headerLabel
-        text: "Title"
+        text: ""
         font: UM.Theme.getFont("default")
         renderType: Text.NativeRendering
         verticalAlignment: Text.AlignVCenter

resources/qml/ExpandablePopup.qml

@@ -113,7 +113,7 @@ Item
             id: disabledLabel
             visible: !base.enabled
             leftPadding: background.padding
-            text: "This component is disabled"
+            text: catalog.i18nc("@label default disabled text", "This component is disabled")
             font: UM.Theme.getFont("default")
             renderType: Text.NativeRendering
             verticalAlignment: Text.AlignVCenter