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functionality: open, close title bar: the same as in 3.5 version, named according to selected (active) component tabs: like in 3.5
According to Petr, this is part of the functional winsys impl and should be assigned to him.
Yes, this is more functional than UI, it is already done. The UI part (i.e. some specially defined outlook will is for other issues). Container for top components, providing selection, activation is done.