Move cursorShape property out of HListView

The Timeline EventList is the only HListView that uses it. For other
list views, it interferes with items like text fields which need to set
cursor shape by themselves.

src/gui/Pages/Chat/Timeline/EventList.qml

@@ -196,6 +196,8 @@ Rectangle {
         property string delegateWithSelectedText: ""
         property string selectedText: ""
 
+        property alias cursorShape: cursorShapeArea.cursorShape
+
         readonly property var redactableCheckedEvents:
             getSortedChecked().filter(ev => eventList.canRedact(ev))
 
@@ -360,6 +362,12 @@ Rectangle {
         // When an invited room becomes joined, we should now be able to
         // fetch past events.
         onInviterChanged: canLoad = true
+
+        MouseArea {
+            id: cursorShapeArea
+            anchors.fill: parent
+            acceptedButtons: Qt.NoButton
+        }
     }
 
     Timer {