[MacPorts] #64820: Xfce4 update

[MacPorts]

#64820: Xfce4 update
-----------------------------+--------------------
 Reporter:  syurin-nagatuki  |      Owner:  (none)
     Type:  update           |     Status:  new
 Priority:  Normal           |  Milestone:
Component:  ports            |    Version:  2.7.2
 Keywords:  Xfce             |       Port:
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 Xfce currently has 4.12 on the port.
 But other platforms use 4.16.
 Please update Xfce to 4.16.

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Ticket URL: <https://trac.macports.org/ticket/64820>
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