WP-Admin/Extended profile tiny improvements

[imath]

Working on documenting this administration screen, I noticed:

1) In multisite configs, it's not possible to edit a profile photo from the User Dashboard area (wp-admin/user/).
2) The primary submit action can be displayed although there's no form to submit.

We'll also need to update the Help tab link once the documentation page will be ready.

• Make sure the JavaScripts to udate a profile photo is loaded into the User Dashboard area.
• Only display the submit button when there’s something to submit!

Trac ticket: ​https://buddypress.trac.wordpress.org/ticket/9217

[imath]

In 13973:

Administration: improve Extended profile screen

• In multisite: make sure the JavaScripts needed to manage the profile photo are loaded into the User Dashboard area.
• Only display the submit button when there’s something to submit:
  • The Community site admin is viewing another profile and can moderate the displayed user’s status.
  • The Community site admin is viewing another profile and can edit the displayed user’s member type.
  • The xProfile component is active and the community admin or the member viewing their own profile can updater profile information.

See #9217
Closes ​https://github.com/buddypress/buddypress/pull/347

[imath]

Just noticed another inconsistency: the button text on top should include "User"

• Sync top button text with WordPress one
• Add a dashicon to inform clicking on the View profile link will be displayed into a new browser’s tab
• Document the Admin Screen.

See ​https://github.com/buddypress/bp-documentation/issues/287

Trac ticket: ​https://buddypress.trac.wordpress.org/ticket/9217

[imath]

In 13975:

Administration: improve & document Extended profile screen

• Make sure the top screen button is using the same text than the WordPress Profile screen.
• Avoid code duplication introducing the get_top_screen_button() method. It outputs the above top screen button for the Pending Users & Extended Profile screens.
• Add a Dashicon to inform clicking on the "View Profile" link will load the page into a new browser’s tab.
• Document this screen into the User handbook.

See #9217
Closes ​https://github.com/buddypress/buddypress/pull/348

[imath]

In 13976:

Administration: update Extend Profile screen’s help tab

• Use the link to the new page of the user Handbook inside the sidebar
• Adapt the help tab content according to available features, current user & the one being viewed.

Fixes #9217