qt6: fix DropShadow

src/app/commoncomponents/BaseModalDialog.qml

src/app/commoncomponents/EmojiReactionPopup.qml

src/app/commoncomponents/EmojiReactions.qml

src/app/commoncomponents/MessageOptionsPopup.qml

src/app/commoncomponents/contextmenu/BaseContextMenu.qml

src/app/mainview/components/AccountComboBoxPopup.qml

src/app/mainview/components/CallButtonDelegate.qml

src/app/mainview/components/ScrollToBottomButton.qml

src/app/mainview/components/TipBox.qml

src/app/webengine/map/StopSharingPositionPopup.qml

src/app/wizardview/components/CreateAccountPage.qml

src/app/wizardview/components/NoUsernamePopup.qml