Global runner registration info improvements for easy copy and retry

This issue comes from: https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/11603#note_31722366

Problem

• Tokens and address are not easy to copy.
• Information can be condensed into 1 section instead of 2.. in order to save vertical space

Proposal/Design

change:

to:

so we make modals to make the copying of the content easier, with an extra button in there as well for refreshing the token.

Note, tooltip should state: Reset runners registration token

the other tooltips should state:

• Copy URL to clipboard
• Copy token to clipboard

cc: @bikebilly @dosuken123