Duplicate referer field when using BP_Group_Extension

[johnjamesjacoby]

When using the BP_Group_Extension, the maybe_create_screen() method makes two calls to wp_nonce_field():

• One via the nonce_field() method
• One directly

Both calls are currently also calling wp_referer_field(), resulting in duplicate fields. The third parameter of wp_nonce_field() is whether or not to automatically create this field, so the solution is to pass false into one of them (most likely the direct call.)

Patch attached.

[johnjamesjacoby]

In 7302:

Fix duplicate referer fields in BP_Group_Extension::maybe_create_screen() method. Fixes #5112.