selection-change event not consistently emitted

[abramz]

Steps for Reproduction

1. Visit this codepen
2. Observe the text blured
3. Focus the editor
4. Observe the text change to focused
5. Click outside of the editor
6. Observe the text change to blured
7. Focus the editor
8. Click the button that says "CLICKING ME DOESN'T UNFOCUS"
9. Observe that the cursor doesn't show up in the editor(meaning it was blured) but the text remains focused

Expected behavior:
As laid out here, clicking anywhere on the page outside of the editor should fire a selection-change event, this includes clicking other UI elements like buttons.

Actual behavior:
Clicking on a button does not fire the selection-change event

Platforms:

Chrome: Version 60.0.3112.101 (Official Build) (64-bit)
OS: macOS 10.12.6 (16G29)

Version:

1.3.1

[jhchen]

Merging with #1397