Fix merge icon alignment in MR widget

This is an actionable insight from the UX Department: MRs experience async critique research (insight).

What

In the merge request widget, when the “Request to merge…” section has two lines, the “merge” icon is not consistently aligned to the top like other widgets:

Request section	Pipeline section

Why

These UI issues contribute to a lack of polish and impact the sense of trust that users place on the product.

How

When there are two lines of text, align the “merge” icon with the first line of the paragraph.