[MacPorts] #69809: oxygen-gtk2: update to 1.4.6

[MacPorts]

#69809: oxygen-gtk2: update to 1.4.6
---------------------------+----------------------
  Reporter:  barracuda156  |      Owner:  RJVB
      Type:  update        |     Status:  assigned
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.9.3
Resolution:                |   Keywords:
      Port:  oxygen-gtk2   |
---------------------------+----------------------

Comment (by RJVB):

 You have commit rights so I'll let you iron out the patched Portfile and
 push it, rather than bothering with a PR.

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Ticket URL: <https://trac.macports.org/ticket/69809#comment:3>
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