Manage user permission in v0.5.0-beta1 is confusing

[brianbgness]

Is your feature request related to a problem? Please describe.
Currently, the 'Manage' user permission lets users to insert/modify/delete tags, and also gives read-only view to the permission checkboxes. This is very confusing to me.

Describe the solution you'd like

1. rename 'Manage' permission to 'Manage Tags'
2. rename 'Edit' permission to 'Edit Cards'
3. rename 'Share' permission to 'Admin'
4. 'Manage Tags' users cannot view any permissions
5. 'Admin' users can set 'Manage Tags' permission
6. 'Admin' users can set 'Edit Cards' permission
7. 'Admin' users can share
8. 'Admin' users have de-facto permission to 'Manage Tags' and 'Edit Cards'
9. Only the owner can set the 'Admin' permission

This way there are three types of users: the owner, admins (which are optional), and regular users.

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[brianbgness]

Oops I failed to include that the 'Manage' permission lets a user assign a card. So continuing from above:

10. create 'Assign Cards' permission
11. 'Admin' users can set 'Assign Cards' permission
12. of course the owner can set all permissions for all users

[brianbgness]

Editing 8 to reflect assigning cards:

8. (edited) 'Admin' users have de-facto permission to 'Manage Tags', 'Edit Cards', and 'Assign Cards'