Issue Summary

This is reproducible on Data Center: yes

Steps to Reproduce

1. If a customer add a custom twitter logo for preview. 
2. The same preview logo is applicable for slack and other platforms as well.

Expected Results

Ideally Page logo should be shown as preview logo for links.

Actual Results

Twitter custom logo is shown as preview logo for slack and all other platforms.

Workaround

Ask user to add twitter integration as same twitter custom logo is being used for preview everywhere. The user can remove twitter integration later.