Adding a loading skeleton for dashboards

Scott Hamptonrequested to merge
dashboard-skeleton into master

A loading skeleton for dashboard pages such as the pipeline dashboard.

In Action:
Screen_Shot_2019-03-05_at_3.06.55_PM

In Storybook (missing CSS that is in CE):
2019-03-05_14.56.30

Edited by Scott Hampton

Merge request reports