This new search placeholder looks much nicer because it allows HTML inside it which
the `placeholder` attribute on `<input>`s doesn't allow.
I tested it for all kinds of cases and it seems to work pretty well.
"Dialog" is the incorrect term here because a dialog is a separate window that still lets you use the app
but a modal is a window where you can't continue using the app until you close it.
stage2: change logic for detecting whether the main package is inside
the std package. Previously it relied on realpath() which is not portable.
This uses resolve() which is how imports already work.
* stage2: fix cleanup bug when creating Module
* flatten lib/std/special/* to lib/*
- this was motivated by making main_pkg_is_inside_std false for
compiler_rt & friends.
* rename "mini libc" to "universal libc"
