note truncation issues when line breaks present

templates/CRM/Contact/Page/View/Note.tpl
change line 250 to: {$note.note|mb_truncate:80:"...":false|nl2br}

currently, if the note contains line breaks (which are converted to html break tags), the truncation can happen in the middle of the tag, which breaks the "more" link. see: http://drupal.demo.civicrm.org/civicrm/contact/view?action=browse&selectedChild=note

the above change processes the truncation before change line breaks to br, and doesn't allow a break mid-word. this ensures better processing (and is more in sync with the use of count_characters later in the file)