smsapp/qml: Define explicit params in signal handlers

smsapp/qml/ChatMessage.qml

@@ -76,7 +76,7 @@ Item {
                         contextMenu.open();
                     }
                 }
-                onPressAndHold: {
+                onPressAndHold: mouse => {
                     var selectStart = messageLabel.selectionStart;
                     var selectEnd = messageLabel.selectionEnd;
                     selectedText = messageLabel.selectedText;

smsapp/qml/ConversationList.qml

@@ -125,11 +125,11 @@ Kirigami.ScrollablePage
                 view.currentIndex = 0
                 filter.forceActiveFocus();
             }
-            Keys.onReturnPressed: {
+            Keys.onReturnPressed: event => {
                 event.accepted = true
                 view.currentItem.startChat()
             }
-            Keys.onEscapePressed: {
+            Keys.onEscapePressed: event => {
                 event.accepted = filter.text != ""
                 filter.text = ""
             }

smsapp/qml/SendingArea.qml

@@ -83,7 +83,7 @@ ColumnLayout {
                         cursorShape: Qt.IBeamCursor
                         z: 1
                     }
-                    Keys.onReturnPressed: {
+                    Keys.onReturnPressed: event => {
                         if (event.key === Qt.Key_Return) {
                             if (event.modifiers & Qt.ShiftModifier) {
                                 messageField.append("")