Fix vertical alignment of icons in Geo Admin UI

The following discussion from !10297 (merged) should be addressed:

• @leipert started a discussion: (+7 comments)

  @brodock Apparently the vertical alignment of the icons is wrong. We do not have fixed this generally yet (please see e.g. https://gitlab.com/gitlab-org/gitlab-ce/issues/46156).

  @annabeldunstone / @ClemMakesApps How would you proceed here, should we fix the vertical alignment here for now or should we rather work on a general fix for icons within buttons?