[Reg 4.6 -> 4.7] Documentation should no longer talk about "Share Application Online" menu

• The banner at the top of https://designviewer.qt.io/ says that the Qt DS 4.7 beta should support the new viewer
• https://doc-snapshots.qt.io/qtdesignstudio/qt-design-viewer.html still talks about "File" > "Share Application Online"

However, that menu option does not exist in Qt DS 4.7 beta. Either it is missing, or the documentation needs updating.