repro case:
1. when viewing a Diff with the file list enabled
2. click and drag the sidebar border and make it twice as wide
3. let go
4. click it again and try to shrink
expect: be able to shrink it back to original size
actual: shrinks by ~original sidebar width and then blocks
subsequent attempts give diminishing returns :D
phabricator 067d12d7168a580bce695cb26331df785f86c2e9 (Fri, Aug 26)
arcanist 9e82ef979e8148c43b9b8439025d505b1219e213 (Thu, Aug 25)
phutil 5fd1af8b4f2b9631e2ceb06bd88d21f2416123c2 (Wed, Aug 24)