Fix NullReferenceException in KeyTips activation. This occured in certain situations when the Alt key is pressed to show key tips: If the ribbon tabs have not been layouted yet (e.g. because the ribbon has always remained minimized so far) they have no visual parent yet. Follow the logical parent in that situation.
Fix NullReferenceException in KeyTips activation.
This occured in certain situations when the Alt key is pressed to show key tips:
If the ribbon tabs have not been layouted yet (e.g. because the ribbon has always remained minimized so far)
they have no visual parent yet. Follow the logical parent in that situation.

Item number: 22355

fmarrabal/Fluent.Ribbon,donisetti/Fluent.Ribbon,someonehan/Fluent.Ribbon,robertmuehsig/Fluent.Ribbon,janmolnar/Fluent.Ribbon,abdelkarim/Fluent.Ribbon,dady8889/Fluent.Ribbon,Cubey2019/Fluent.Ribbon,fluentribbon/Fluent.Ribbon,huoyaoyuan/Fluent.Ribbon,mokeev1995/Fluent.Ribbon,pekspro/Fluent.Ribbon,punker76/Fluent.Ribbon,asamijuf/Fluent.Ribbon,natalil/Fluent.Ribbon,fluentribbon/Fluent.Ribbon,VegasoftTI/Fluent.Ribbon,usmanm77/Fluent.Ribbon,wskplho/Fluent.Ribbon,ruisebastiao/Fluent.Ribbon,pekspro/Fluent.Ribbon,chrfin/Fluent.Ribbon