Fix: misalignment at mr state container

What does this MR do and why?

The icon size was set to 24px in !94370 (merged), and the content text line height is still 16px, and because that the parent element applies gl-display-flex, the height of the content text section is therefore 24px when the line height and height is inconsistent texts would not be aligned in the middle.

/cc @prajnamas @orozot @qk44077907 @lxwan

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