Improve documentation for edit_user_profile and show_user_profile actions

[jeremyfelt]

The show_user_profile and edit_user_profile actions both describe themselves as: "Fires after the 'About the User'/'About Yourself' settings table", which is somewhat correct, but doesn't really tell the full story.

The table structure on this page is:

• Personal Options
• Name
• Contact Info
• About Yourself / About the User
• Account Management (i.e. passwords)
• Application Passwords (which is not a "table", but is a contained section)
• show_user_profile / edit_user_profile action
• Additional Capabilities

I don't have any strong suggestions on wording, but we should be able to clarify where the action fires. Maybe "toward the end of the edit user/profile screen, before Additional Capabilities"?