Fix the width of project avatars in order to adjust alignment within their container element

## What does this MR do?
Adjusts the width of project avatars in order to fix their alignment within the container elements.

## Are there points in the code the reviewer needs to double check?
To make sure there are no unintentional styles changes on unrelated elements.

## Why was this MR needed?
To fix the issue seen below.

## Screenshots (if relevant)
Before: ![Screen_Shot_2016-11-26_at_3.55.58_PM](/uploads/c0012ee7bb5f9e83af41190f71f030fa/Screen_Shot_2016-11-26_at_3.55.58_PM.png)

After: ![Screen_Shot_2016-11-26_at_3.56.17_PM](/uploads/c1236216382e6baa094570c17565e8cf/Screen_Shot_2016-11-26_at_3.56.17_PM.png)

Affected pages: ![Screen_Shot_2016-11-26_at_4.12.38_PM](/uploads/8db6d86a5998843e7b7a755fb4000add/Screen_Shot_2016-11-26_at_4.12.38_PM.png)

## What are the relevant issue numbers?
Closes #24999

See merge request !7772