Move reply pane to use MessageContentModel

Move reply pane to use MessageContentModel. This means the reply pane component is no longer required.

This commit also limits the size of code and image componets in a reply to keep them from getting too huge.

src/timeline/ReplyMessageComponentChooser.qml

@@ -5,6 +5,8 @@ import QtQuick
 import QtQuick.Layouts
 import Qt.labs.qmlmodels
 
+import org.kde.kirigami as Kirigami
+
 import org.kde.neochat
 
 /**
@@ -60,6 +62,7 @@ DelegateChooser {
             MediaSizeHelper {
                 id: mediaSizeHelper
                 contentMaxWidth: root.maxContentWidth
+                contentMaxHeight: Kirigami.Units.gridUnit * 5
                 mediaWidth: image.mediaInfo.width ?? 0
                 mediaHeight: image.mediaInfo.height ?? 0
             }
@@ -81,6 +84,7 @@ DelegateChooser {
     DelegateChoice {
         roleValue: MessageComponentType.Code
         delegate: CodeComponent {
+            Layout.maximumHeight: Kirigami.Units.gridUnit * 5
             maxContentWidth: root.maxContentWidth
 
             MouseArea {