Undo debugging data
Fix Wavelet Root Conversation id generation

Means that getRoot() works for federated waves now.
Revert "Revert "Fixes WAVE-354: SimpleSearch.DigestProxy should update only the opened""

This reverts commit 35313df5546622d9b10ac53b60b022317cebdeb6.

Although this commit no longer causes shiny's with federated waves, it
seems to be making the search much 'laggier' than it used to be. So, it
looks like it needs looking in to some more.