Alignment improvements to related issue UI

Problem to solve

The following discussion from !8267 (merged) should be addressed:

> ## 1 
> 
> vertical alignment seems slightly off :thinking: 
> 
> ![image](/uploads/d091b80e0b65a578802234c3b64429cc/image.png)
> 
> ## 2
> 
> Vertical and horizontal centering of icon within buttons seems slightly off?
> 
> ![image](/uploads/753e6280b4cedfdf60a8addb005c7945/image.png)

Further details

Proposal

What does success look like, and how can we measure that?

Alignments are fixed, elements are centered correctly

Links / references

cc: @pedroms @winh