Add custom-commands to OSX icon theme

launcher/resources/OSX/OSX.qrc

@@ -9,6 +9,7 @@
         <file>scalable/checkupdate.svg</file>
         <file>scalable/copy.svg</file>
         <file>scalable/coremods.svg</file>
+        <file>scalable/custom-commands.svg</file>
         <file>scalable/externaltools.svg</file>
         <file>scalable/help.svg</file>
         <file>scalable/instance-settings.svg</file>

launcher/resources/OSX/scalable/custom-commands.svg

@@ -0,0 +1,71 @@
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