Bug 35980: Check for CAN_user_borrowers_edit_borrowers in members-toolbar.inc

Bug 35980: Check for CAN_user_borrowers_edit_borrowers in members-toolbar.inc

This patch removes the message button and more links from the members toolbar if the user does not have CAN_user_borrowers_edit_borrowers

To test:
1. Log in with a user with only 'catalogue' and 'list_borrowers' permissions
2. Search for a patron
3. Notice the 'Add message' and 'More' buttons in the toolbar only link to permissions errors
3. Apply patch, restart all, reload the page
4. Notice the buttons in the toolbar are gone

Signed-off-by: Julian Maurice <julian.maurice@biblibre.com>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>