Refine sharing section.

[dsummersl]

Open Questions:

• Do we only want owners to share and edit?
• What is the definition of sharable?
• There is a 'shareable' option that owners can give to groups/users that they share with, but that may not make sense, depending on the definition of 'shareable'.
• Currently 'managing access' allows one to view, edit, or own the document. What are the consequences of our definition of sharing for this feature?
• Change Sharing status section to something like “Document Visibility”? self (owner), trustees, professionals
• Is the concept of authorship important in MyHPOM - if not, columns and fields referencing the author could be removed. If so, we could document some scenarios for users so that we are sure to include it for new features where appropriate.

Things we already know we want to do are listed in the AC below.

AC:

• Hide Sharing status because it is always private. (make sure we-re leaving the shareable checkbox)