Searching system preferences using just a bracket (either ( or )) generates an error trace.[1]

Other characters, such as {, !, ;, <, @, #, %, and so on, don't do the same.

Ideally, you should just get search results or a 'No system preferences matched your search for: XXXX' message.


[1] Error trace:

Unmatched ( in regex; marked by <-- HERE in m/^( <-- HERE $/ at /kohadevbox/koha/admin/preferences.pl line 201

    in CGI::Compile::ROOT::kohadevbox_koha_admin_preferences_2epl::TransformPrefsToHTML at /kohadevbox/koha/admin/preferences.pl line 201

      198:                         my $chunk = _get_chunk( $value, %$piece );
      199: 
      200:                         # No highlighting of inputs yet, but would be useful
      201:                         $chunk->{'highlighted'} = 1 if ( $searchfield && $name =~ /^$searchfield$/i );
      202: 
      203:                         if ( $name eq 'Pseudonymization' && ! C4::Context->config('bcrypt_settings')) {
      204:                             push @warnings, 'bcrypt_config_not_set';

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