Revert "Synchronizes  the visibliety of RibbonContextualTabGroup and RibbonTabItem when adding RibbonTabItem to RibbonContextualTabGroup"
Revert "Synchronizes  the visibliety of RibbonContextualTabGroup and RibbonTabItem when adding RibbonTabItem to RibbonContextualTabGroup"

This reverts commit e16fde1e0ac07d949a175ccc3755e8ecd92586e7.

fmarrabal/Fluent.Ribbon,wskplho/Fluent.Ribbon,abdelkarim/Fluent.Ribbon,Cubey2019/Fluent.Ribbon,usmanm77/Fluent.Ribbon,punker76/Fluent.Ribbon,mokeev1995/Fluent.Ribbon,huoyaoyuan/Fluent.Ribbon,robertmuehsig/Fluent.Ribbon,fluentribbon/Fluent.Ribbon,dady8889/Fluent.Ribbon,chrfin/Fluent.Ribbon,fluentribbon/Fluent.Ribbon