Explore the use of icons for showing attribution info in issue queues

#2340363: Add issue comment attribution → aims to allow users to specify employers/customers who've sponsored their work in the issue queues. When displayed in comments it looks like this (atm, subject to change before deployment):

However, rather than the "Credit" string, we could also explore the use of icons for this. For example, the following suggestion from markcarver in #2340363-132: Add issue comment attribution → :

(This icon is from https://www.iconfinder.com/icons/309041/group_people_users_icon#size=128 and is Creative Commons (Attribution 3.0 Unported) licensed.)

Another option might be to re-use some of the imagery in Dries's Amsterdam keynote (probably not those exact images, but something similar) and optionally "light up" those that are applicable to a given comment:

Also note that per drumm in #2340363-141: Add issue comment attribution → :

For an icon, we would need a properly-licensed SVG icon that we all agree represents the concept of credit or attribution.

Advantages of icons, per markcarver in #2340363-144: Add issue comment attribution → :

• Icons are less intrusive
• They break up a lot of grey text
• They can be symbolic of what they're representing (organizations/customers) without having to speculate
• With icons, people are more likely to inspect it and form their own associations, rather than jumping to conclusions ("Who's Credit?")

Ideas welcome!