Devtools Improvements

- Now has tabs setup as more features are added
- First extra tab has basic server info
- Use mobileform to make it look nicer
- For the room data tab allow the room to be changed from within devtools
- For the room data tab allow m.room.member events to be filtered out so other event types can be found easily
- For the room data tab allow viewing room account data

network/neochat#557

src/neochatroom.h

@@ -749,6 +749,11 @@ public:
     Q_INVOKABLE PollHandler *poll(const QString &eventId);
 #endif
 
+    /**
+     * @brief Get the full Json data for a given room account data event.
+     */
+    Q_INVOKABLE QByteArray roomAcountDataJson(const QString &eventType);
+
 private:
     QSet<const Quotient::RoomEvent *> highlights;