closing a split screen terminal moves tab to end

[pcnate]

• OS version and name: Windows 10 1803 Build 17134.706
• Hyper.app version: 3.0.0 (also noticed on 2.x.x)
• Link of a Gist with the contents of your .hyper.js: https://gist.github.com/pcnate/fcc7b45394d0c8d74f4b4f98ce329fa5
• Relevant information from devtools: N/A
• The issue is reproducible in vanilla Hyper.app: No. seems to only occur with hyperlayout installed

Issue

Current tab switches to the end of the list when exiting (possibly) the first shell on a split tab. It doesn't always happen as far as I can tell.

Steps to reproduce:

1. Open multiple tabs with multiple splits
2. switch to the first tab and type exit on the top left most terminal.
3. Check tab position. Most cases it switches to the last tab