avm2: Properly implement Stage.tabChildren
#16608
Merged
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Related to #5443. Fixes #16589.
Turns out that
Stage.tabChildren
's behavior is a bit strange, because it always returnstrue
, but when its value is set, it's propagated to the root movie.Covered by
avm2/tab_ordering_stage_tab_children
.Additionally added "Tab children enabled" to debug UI.