Delete old room list

CMakeLists.txt

resources/qml/Root.qml

src/ChatPage.cpp

src/ChatPage.h

src/CommunitiesList.cpp

src/CommunitiesList.h

src/CommunitiesListItem.cpp

src/CommunitiesListItem.h

src/MainWindow.cpp

src/MainWindow.h

src/RoomInfoListItem.cpp

src/RoomInfoListItem.h

src/RoomList.cpp

src/RoomList.h

src/popups/PopupItem.cpp

src/popups/PopupItem.h

src/popups/SuggestionsPopup.cpp

src/popups/SuggestionsPopup.h

src/popups/UserMentions.cpp

src/popups/UserMentions.h