Fix some qml warnings

CMakeLists.txt

resources/qml/EncryptionIndicator.qml

resources/qml/ImageButton.qml

resources/qml/Root.qml

resources/qml/TopBar.qml

resources/qml/UploadBox.qml

resources/qml/components/AdaptiveLayout.qml

resources/qml/components/AdaptiveLayoutElement.qml

resources/qml/components/AvatarListTile.qml

resources/qml/components/MainWindowDialog.qml

resources/qml/components/ReorderableListview.qml

resources/qml/delegates/Encrypted.qml

resources/qml/delegates/FileMessage.qml

resources/qml/delegates/ImageMessage.qml

resources/qml/delegates/PlayableMediaMessage.qml

resources/qml/delegates/Redacted.qml

resources/qml/delegates/Reply.qml

resources/qml/delegates/TextMessage.qml

resources/qml/dialogs/IgnoredUsers.qml

resources/qml/dialogs/RoomSettingsDialog.qml