Enable mangling in Uglify.js by default.
Review Request #12800 — Created Jan. 23, 2023 and submitted
Modern versions of Uglify don't mangle (alter code to shorten variable
names and logic) by default, which can mean losing out on some nice
reductions in file sizes. For our stuff, we want to default to mangling.
While this make a small difference for Djblets (about a 90KB savings),
it can make a much larger difference for consumers.
The arguments now include
--compress --mangle, just to be thorough.
This is set automatically in
build_pipeline_settings(), and can be
turned off if required.
Successfully built static media for Djblets and Review Board and tested
it across many areas of the sites.