User details template new hook

[dimitrov.adrian]

We can override the template but it will cost extra maintance if new version is updated, so one extra hook will cost so little, but can save many effort.

[dimitrov.adrian]

The missing patch path is

bbpress/templates/default/bbpress/user-details.php

[netweb]

Refreshed patch against /trunk

Each patch of the three patches I added are identical (2537.patch, 2537.diff​ & user-details.php.2.patch​)

Added variants for testing with grunt patch

[netweb]

In 2537.2.diff:

A refresh with before and and after hooks:

• bbp_template_before_user_details_menu_items
• bbp_template_after_user_details_menu_items

Also sneaks before and after hooks into content-single-user.php

• bbp_template_before_user_wrapper
• bbp_template_after_user_wrapper

[johnjamesjacoby]

In 5854:

Templates: Add before & after hooks to user templates parts.

This changeset makes it easier to add custom text & HTML before & after user details.

Props netweb. Fixes #2537.