Fix Eventhandler strings for translation

Change the generic representations of events in event handler to always have a full string to aid translation.

The aggregated list is then converted to be a simple list of single event generic descriptions to avoid string puzzles.

Fixes network/neochat#638

BUG: 466201, BUG: 491024

src/timeline/StateDelegate.qml

@@ -147,10 +147,9 @@ TimelineDelegate {
                 Layout.fillWidth: true
                 visible: root.folded
 
-                text: `<style>a {color: ${Kirigami.Theme.textColor}}</style>` + root.aggregateDisplay
-                elide: Qt.ElideRight
-                textFormat: Text.RichText
-                wrapMode: Text.WordWrap
+                text: root.aggregateDisplay
+                textFormat: TextEdit.StyledText
+                elide: Text.ElideRight
                 onLinkActivated: RoomManager.resolveResource(link)
                 HoverHandler {
                     cursorShape: parent.hoveredLink ? Qt.PointingHandCursor : Qt.IBeamCursor