Make more page types use React, remove some unneeded jQuery-find functions.
Make embedded comments somewhat work with React

But posting comments seem broken, fix later.
Split page role Generic into HomePage and WebPage.
Fix db test suite compilation errors.
Make config pages editable again, stop using tpi.renderedPage.
Show '?' after guest names, pins, and root post like counts.
Remove Scala HTML rendering code (except for some old forms).
Remove unused d.v0.showInteractionsOnClick().