[wp-meta] [Making WordPress.org] #6862: Add support for component Slack channels

[Making WordPress.org]

#6862: Add support for component Slack channels
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 Reporter:  desrosj                   |       Owner:  (none)
     Type:  enhancement               |      Status:  new
 Priority:  normal                    |   Milestone:
Component:  Make (Get Involved) / P2  |  Resolution:
 Keywords:  has-patch                 |
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Comment (by desrosj):

 Props to @bph for this idea!

 I worked up a patch, but I was having trouble getting a local instance of
 the site up and running with a working Components page. So it may need
 some visual adjustments.

 For the componennts table, I pictured just the Slack icon showing within
 the column. I saw that there's some CSS to automatically add the icon
 `::before`, for all `a` tags with a Slack URL, but wasn't sure if there
 was already an easy way to hide text visually on .org (`.screen-reader-
 text` is only admin facing, as far as I know).

 I've also rearranged the single components page just a bit.

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Ticket URL: <https://meta.trac.wordpress.org/ticket/6862#comment:2>
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