Revert "Update QtQuick versions to match Qt 5.10"

.ci/format.sh

resources/qml/Avatar.qml

resources/qml/Completer.qml

resources/qml/EncryptionIndicator.qml

resources/qml/ImageButton.qml

resources/qml/MatrixText.qml

resources/qml/MessageInput.qml

resources/qml/MessageView.qml

resources/qml/NhekoBusyIndicator.qml

resources/qml/Reactions.qml

resources/qml/ReplyPopup.qml

resources/qml/ScrollHelper.qml

resources/qml/StatusIndicator.qml

resources/qml/TimelineRow.qml

resources/qml/TimelineView.qml

resources/qml/TopBar.qml

resources/qml/TypingIndicator.qml

resources/qml/UserProfile.qml

resources/qml/delegates/FileMessage.qml

resources/qml/delegates/ImageMessage.qml