Change all font-sizes in MR widget body to 14px

This issue is part of https://gitlab.com/gitlab-org/gitlab-ce/issues/33095

Design/Proposal

  • Change all font-sizes in MR widget body to 15px

font-size

cc: @victorwu (making the https://gitlab.com/gitlab-org/gitlab-ce/issues/33095 more readable)

Edited by Dimitrie Hoekstra