Collection and Network Styling Improvements

[chriswhong]

Collection View

• Prevent horizontal scrolling (flex)
• Border under list header
• Clean up padding/margins
• Hover styling - indicate clickability
• Handle long dataset references

all closed in #633

Network View

• Center loading spinner
• Use DatasetSummmary from qri cloud for consistent list view
• Revisit header text/size
• Network preview
  • header text
  • Cleanup unneeded text in sidebar header
  • Minor improvements to Preview pane/components

[chriswhong]

In order to use DatasetSummary cards from cloud in desktop, we need the following additional values in VersionInfo

Description and Keywords:
metaDescription
keywords

If we want to show the stats in the top right of the card:
downloadCount
pullCount
issueStats
followStats

[b5]

ok, getting all of these delivered is going to take a bunch of doing on the backend. For now I think we should redact these fields from desktop & create an issue to add them back

[dustmop]

Question about this. We basically defined VersionInfo as "what qri list needs to display its results", with the near future plan that dscache would store exactly a list of VersionInfo. Most of these fields are only relevant to cloud, right? In other words, they don't make any sense for a user's local list of datasets. In that case, it sounds like this is a cloud-specific need, and shouldn't be added to VersionInfo, rather it should be some different type of api call.