Create component variant for icon-only buttons
Buttons that contain only an icon should
- have equal width and height
- have text / svg fill color
#707070
(gray-700) by default
(https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/20077#note_84619366)
- this needs to be documented on https://design.gitlab.com/components/buttons
- we need to introduce a new CSS and / or Vue component that simplifies this
Edited by Andreas Kämmerle