Show more details on Plugin marketplaces and provide update option

[mbektas]

as @pjdoland mentioned here #284 (review) we can provide a way to update marketplaces.

• on Plugins tab, each marketplace row can show more information, such as:
  • description
  • version
  • count and list of plugins as much as can fit on the row, trimmed with ellipsis
• there can be an update button on the row to update the marketplace.

[pjdoland]

Will have this PR in shortly.