Menu items are on their way out of the calendar drop down, so let's
start with the easy one. This one is removed without replacement,
but then the Date & Time panel should be a one-time stop for most
users anyway, so not having a direct shortcut should not be much of
a problem. It is also the last remaining Settings item outside the
system menu ...
https://bugzilla.gnome.org/show_bug.cgi?id=744817
de27e4e1b2