add popover for org_profile page and add explanation for public plan

[pengyin-shan]

1. Org admins using DMP Assistant used to ask why they cannot change organizational types (Add popover information to Organization details view portagenetwork/roadmap#82), thus adding a pop-over would be useful:

The contact email part will pick up the email setting in the configuration.

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2. Similarly, update the message on the Plan Share page to clarify the definition of 'Public' based on the previous requests from DMP Assisant users ((Change label to Plan visibility public plan portagenetwork/roadmap#81):

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Both of the edits will require translation.io sync

[github-actions]

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🚫	Please include a CHANGELOG entry. You can find it at [CHANGELOG.md](https://github.com/DMPRoadmap/roadmap/blob/main/CHANGELOG.md).

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