#3568 / Form: fuer alle Buttons (save, close, new, delete) eine optionale class & text konfigurierbar machen
Manual.rst: new configuration options listed at config.qfq.ini and Form.paramtert.
Config.php: Defaults configured for F_SAVE|CLOSE|DELETE|NEW_BUTTON_TEXT|TOOLTIP|CLASS|GLYPH_ICON.
BuildFormBootstrap.php: Changed code to take values from config.qfq.ini or (if given) from form.parameter definitions.
QuickFormQuery.php: Copy new setup values from config.qfq.ini to Form.
StoreTest.php: update unit test for new global configuration values
config.qfq.example.ini: fill with new commented key/value pairs.