The blog post is here:
https://blogs.embarcadero.com/coming-in-florence-titlebar-styling-and-scrollable-actionmenus-in-vcl/
and it includes information on VCL TitleBar Styling and Scrollable ActionMenus, two top voted extensions to existing components.
Notioce that he blog post is based on a pre-release version of the RAD Studio software. No feature is committed until the product’s GA release.