Create a list model for readmarkers

Create a list model for read markers. The primary reason is to stop `RoomMembers` being accessed after their state event is deleted. With this the read marker doesn't pass and `RoomMember` objects to qml.

src/timeline/AvatarFlow.qml

@@ -13,20 +13,21 @@ Flow {
     property var avatarSize: Kirigami.Units.iconSizes.small
     property alias model: avatarFlowRepeater.model
     property string toolTipText
-    property alias excessAvatars: excessAvatarsLabel.text
 
     spacing: -avatarSize / 2
     Repeater {
         id: avatarFlowRepeater
         delegate: KirigamiComponents.Avatar {
-            required property var modelData
+            required property string displayName
+            required property url avatarUrl
+            required property color memberColor
 
             implicitWidth: root.avatarSize
             implicitHeight: root.avatarSize
 
-            name: modelData.displayName
-            source: modelData.avatarUrl
-            color: modelData.color
+            name: displayName
+            source: avatarUrl
+            color: memberColor
         }
     }
     QQC2.Label {
@@ -34,6 +35,9 @@ Flow {
         visible: text !== ""
         color: Kirigami.Theme.textColor
         horizontalAlignment: Text.AlignHCenter
+
+        text: root.model?.excessReadMarkersString ?? ""
+
         background: Kirigami.ShadowedRectangle {
             color: Kirigami.Theme.backgroundColor
             Kirigami.Theme.inherit: false
@@ -54,7 +58,7 @@ Flow {
         }
     }
 
-    QQC2.ToolTip.text: toolTipText
+    QQC2.ToolTip.text: root.model?.readMarkersString ?? ""
     QQC2.ToolTip.visible: hoverHandler.hovered
     QQC2.ToolTip.delay: Kirigami.Units.toolTipDelay
 

src/timeline/MessageDelegate.qml

@@ -82,16 +82,6 @@ TimelineDelegate {
      */
     required property var readMarkers
 
-    /**
-     * @brief String with the display name and matrix ID of the other user read markers.
-     */
-    required property string readMarkersString
-
-    /**
-     * @brief The number of other users at the event after the first 5.
-     */
-    required property var excessReadMarkers
-
     /**
      * @brief Whether the other user read marker component should be shown.
      */
@@ -342,8 +332,6 @@ TimelineDelegate {
             Layout.rightMargin: Kirigami.Units.largeSpacing
             visible: root.showReadMarkers
             model: root.readMarkers
-            toolTipText: root.readMarkersString
-            excessAvatars: root.excessReadMarkers
         }
 
         DelegateSizeHelper {

src/timeline/StateDelegate.qml

@@ -53,16 +53,6 @@ TimelineDelegate {
      */
     required property var readMarkers
 
-    /**
-     * @brief String with the display name and matrix ID of the other user read markers.
-     */
-    required property string readMarkersString
-
-    /**
-     * @brief The number of other users at the event after the first 5.
-     */
-    required property var excessReadMarkers
-
     /**
      * @brief Whether the other user read marker component should be shown.
      */
@@ -197,8 +187,6 @@ TimelineDelegate {
             Layout.alignment: Qt.AlignRight
             visible: root.showReadMarkers
             model: root.readMarkers
-            toolTipText: root.readMarkersString
-            excessAvatars: root.excessReadMarkers
         }
     }