Redmine

Updated some translation files for Simplify Chinese and Traditional Chinese under revision 15582.
h3. the locale items are:

• earlier_than_minimum_start_date(both zh and zh-TW)
• label_link(only zh)
• label_only(only zh)
• error_no_tracker_allowed_for_new_issue_in_project(only zh)
• label_tracker_all(only zh)
• setting_new_item_menu_tab(only zh)
• label_new_object_tab_enabled(only zh)