SciDAVis - Improvements SVN-temp

decimal separator"
- ASCII import dialog: moved the "help" button into the lower right corner
- ASCII import dialog und preferences dialog: changed "system locale setting"
to "default (...)"
- preferences dialog: added a preview box for the numeric format
- column options and set column values dialog: changed the "<<" and ">>"
buttons to "<< prev." and "next >>"
- added support for custom QLocale handling in the fit wizard
- renamed the "data" menu to "tools"
- added a submenu to show/hide toolbars to the "view" menu