Move dialogs into a separate dir and create them dynamically.

Add "ignore user".
Update libqmatrixclient.

src/userlistmodel.h

@@ -17,7 +17,12 @@ class UserListModel : public QAbstractListModel {
   Q_PROPERTY(
       QMatrixClient::Room* room READ room WRITE setRoom NOTIFY roomChanged)
  public:
-  enum EventRoles { NameRole = Qt::UserRole + 1, UserIDRole, AvatarRole };
+  enum EventRoles {
+    NameRole = Qt::UserRole + 1,
+    UserIDRole,
+    AvatarRole,
+    ObjectRole
+  };
 
   using User = QMatrixClient::User;