Test file for 0.8.3: https://rawgit.com/akalin/cc8023a41d1fc1cd0250bc50d122680f/raw/ed169e5a427382c12543a0b941ae66c34eda0003/test-0.8.3.html

Test file for 0.9.0-alpha1:
https://rawgit.com/akalin/cc8023a41d1fc1cd0250bc50d122680f/raw/e7b2ba03faa7b28b93951dc21402fc5ab443f0eb/test-0.9.0-alpha1.html

Vertical divider isn't visible at 100% zoom with Chrome Version 64.0.3269.3 (Official Build) dev (64-bit) on macOS 10.13.1, but they show up at 110%.

Related to #824, but @ronkok says he wants to fix that one first before doing this one.

Gist: https://gist.github.com/akalin/cc8023a41d1fc1cd0250bc50d122680f