Bug 30611: (QA follow-up) Only show reset option for allowed categories

Bug 30611: (QA follow-up) Only show reset option for allowed categories

This patch adds a check that the patron can reach the password reset
page using category.effective_reset_password which handles fallback to
OpacResetPassword system preference transparently.

Test plan
1) Set at least one patron category to dissallow patron password resets
2) Search for a patron of that category
3) Confirm the 'Send password reset' option no longer appears

Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>