Search results do not maintain their expansion state if there is an update.

[gbracha]

May require tagging the individual mirror groups. But the problem may be with the fact that elements are deferred, and DeferredContentComposer doesn't update the deferred fragments. Indeed, when it updates, it never compares the results of the old deferred computation to the new ones - it just installs the new ones when they are ready. Presumably it should update the old deferred part using the new deferred part. This may be tricky because the visuals may disappear underfoot if we replace them with the initial values.