More image dialog fixes

resources/qml/Root.qml

resources/qml/delegates/ImageMessage.qml

resources/qml/dialogs/ImageOverlay.qml

resources/qml/dialogs/UserProfile.qml

src/BlurhashProvider.h

src/CacheCryptoStructs.h

src/ColorImageProvider.h

src/EventAccessors.h

src/InviteesModel.cpp

src/JdenticonProvider.cpp

src/MainWindow.h

src/MxcImageProvider.h

src/dbus/NhekoDBusApi.cpp

src/dbus/NhekoDBusBackend.cpp

src/encryption/DeviceVerificationFlow.cpp

src/encryption/VerificationManager.cpp

src/main.cpp

src/notifications/ManagerWin.cpp

src/timeline/CommunitiesModel.cpp

src/timeline/DelegateChooser.h