Changed so there is no 1-to-1 mk-tag/id assumption, any unique ids
create a simulated lifetime to render. This fixes the issue where
grows/shrinks left-aligned ids confused dbgrbyd.py.
As a plus, now dbgrbyd.py can actually handle multi-id grow/shrinks, and
is more robust against out-of-sync grow/shrinks. This sort of lifetime issues
are when you'd want to run dgbrbyd.py, so it's a bit important this is handled
gracefully.
89ab174f33