external_multi_select view issue when pressing enter key

[cerebrusdev]

Description

Hi Slack team,

Pressing enter key in multi_select view causes view to crash. See details in below bug section.

What type of issue is this? (place an x in one of the [ ])

• [ x] bug
• [ ] enhancement (feature request)
• [ ] question
• [ ] documentation related
• [ ] testing related
• [ ] discussion

Requirements (place an x in each of the [ ])

• [ x] I've read and understood the Contributing guidelines and have done my best effort to follow them.
• [ x] I've read and agree to the Code of Conduct.
• [ x] I've searched for any related issues and avoided creating a duplicate issue.

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Bug Report

I am using views API to create a Modal that contains a multi_external_select element. When I type and try to select an item from options list via keyboard pressing enter key turns modal into "We can't fully display this message" dialog.

Reproducible in:

Development environment: Mac OS Mojave Slack app Web slack app on Google Chrome

Steps to reproduce:

1. Open a modal view with multi_external_select element
2. Start typing with computer keyboard to bring option suggestions
3. Navigate with arrow down button and press enter button to select

Expected result:

The option I press enter on should be added to selected options

Actual result:

Dialog turns into "We can't fully display this message" dialog and the content is lost

Attachments: