Room items subtitles: fix redacts HTML escaping

Redaction events displayed as subtitles of left pane rooms were
accidentally double-escaped, leading to e.g. "X's message was removed by
Y" being rendered without the apostrophe

src/gui/Utils.qml

@@ -229,7 +229,7 @@ QtObject {
             // FIXME: this can generate an "argument missing" warning because
             // QML first gets notified of the event type change, *then* of the
             // content change.
-            let content = qsTr(escapeHtml(ev.content)).arg(sender)
+            let content = qsTr(ev.content).arg(sender)
 
             if (ev.content.includes("%2"))
                 content = content.arg(coloredNameHtml(