this formally kills off the flat view

anyone who is already using it will be able to keep using it but if
they switch to tabbed view they won't be able to go back;
also, this removes it from the default user preferences;
to anyone reading this.. sorry for the executive decision, but the flat
view is no longer maintained and full of bugs;
this removes the daylight savings time info which was never used anyway
adding notes on field name changes
add info