>>I can do that w/o your help by naming folder, for example, "*Favorite messages". However to save message to it requires Click to open combo + Scroll to the foder + Clicks to confirm selection. I can live with that but, as I said, it woul be nice to have a one-click option to add message to "Favorite Messages" or "*Favorite messages" folder.
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>There's no confirmation on the click. This is instant selection as soon as the mouse is released.

I'm not sure what you mean because dropdown states open forever if I don't click on a folder to select it after I scroll to it. Anyway, I'm okey with not having "a one-click option".