The Group "Swidgets" is selected, but why by Grey Color; usually I can just click a Grey Group/Layer, to turn it Blue(thus Activate,) but not with this one particularly saved .PSD file?

With a Grey Selection I ca'nt make changes to a Group/layer, because it is as of yet has not been "Activated"(I think?)

Can anyone explain the difference in Selection; between these two States of the Layers Palette?