Prepare for reuseItems in timeline

resources/qml/ForwardCompleter.qml

resources/qml/MessageView.qml

resources/qml/ReplyPopup.qml

resources/qml/StatusIndicator.qml

resources/qml/TimelineRow.qml

resources/qml/delegates/FileMessage.qml

resources/qml/delegates/ImageMessage.qml

resources/qml/delegates/MessageDelegate.qml

resources/qml/delegates/Placeholder.qml

resources/qml/delegates/PlayableMediaMessage.qml

resources/qml/delegates/Reply.qml

resources/qml/delegates/TextMessage.qml

resources/qml/voip/ActiveCallBar.qml

resources/qml/voip/CallInviteBar.qml

resources/qml/voip/PlaceCall.qml

src/timeline/TimelineModel.cpp

src/timeline/TimelineModel.h