NavTabs: Avoid recursion when 'active tab' contains macros #2751
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If the "active tab" property contains macros, like
$(TAB=0)to allow an optional macro to configure the initially active tab, then the expansion of that macro resulted in infinite recursion because the value of the active tab is used to construct the effective macros, which are fetched to resolve$(TAB)and so on.Fixed by expanding the "active" property using parent macros.