Rework ActionsHandler

Rework ActionsHandler as static helper functions.

The functions are now invoked from ChatBarCache so there is no need to pass an actions handler object around qml simplifying the code.

src/chatbarcache.cpp

@@ -5,6 +5,7 @@
 
 #include <Quotient/roommember.h>
 
+#include "actionshandler.h"
 #include "chatdocumenthandler.h"
 #include "eventhandler.h"
 #include "neochatroom.h"
@@ -259,4 +260,15 @@ void ChatBarCache::setSavedText(const QString &savedText)
     m_savedText = savedText;
 }
 
+void ChatBarCache::postMessage()
+{
+    auto room = dynamic_cast<NeoChatRoom *>(parent());
+    if (room == nullptr) {
+        qWarning() << "ChatBarCache created with incorrect parent, a NeoChatRoom must be set as the parent on creation.";
+        return;
+    }
+
+    ActionsHandler::handleMessageEvent(room, this);
+}
+
 #include "moc_chatbarcache.cpp"