Get rid of the tweakParseTreeNode() hack

It’s an embarrassing hangover from a refactoring of the parsing
mechanism last year.
Tabs appearance tweaks
Fix problem with advanced search counts

Apologies to TiddlyWiki’s translators for disrupting existing work!
Clean up startup logging

Now we do boot logging to an array. We harvest it in the —verbose
command. We still need to provide a way to access the log in the
browser too.