Rename source property of MessageDelegateContextMenu

Starting with Qt6.6, this collides with a FINAL property of Loader and thus doesn't run

src/qml/Component/Timeline/TimelineContainer.qml

@@ -622,7 +622,7 @@ ColumnLayout {
             selectedText: selectedText,
             author: root.author,
             eventId: root.eventId,
-            source: root.jsonSource,
+            eventSource: root.jsonSource,
             eventType: root.delegateType,
             plainText: root.plainText,
             htmlText: root.display,

src/qml/Menu/Timeline/FileDelegateContextMenu.qml

@@ -92,7 +92,7 @@ MessageDelegateContextMenu {
             icon.name: "code-context"
             onTriggered: {
                 applicationWindow().pageStack.pushDialogLayer('qrc:/MessageSourceSheet.qml', {
-                    sourceText: root.source
+                    sourceText: root.eventSource
                 }, {
                     title: i18n("Message Source"),
                     width: Kirigami.Units.gridUnit * 25

src/qml/Menu/Timeline/MessageDelegateContextMenu.qml

@@ -16,7 +16,7 @@ Loader {
     required property var author
     required property string eventId
     property var eventType
-    required property string source
+    required property string eventSource
     property string selectedText: ""
     required property string plainText
     property string htmlText: undefined
@@ -85,7 +85,7 @@ Loader {
             icon.name: "code-context"
             onTriggered: {
                 applicationWindow().pageStack.pushDialogLayer('qrc:/MessageSourceSheet.qml', {
-                    sourceText: root.source
+                    sourceText: root.eventSource
                 }, {
                     title: i18n("Message Source"),
                     width: Kirigami.Units.gridUnit * 25