allow for 18x18 icon on mac
the systray library has 16x16 size hard coded, but our icon should be 18x18
we need to either fork the library to hard code 18x18, or fork the library to allow the size as an argument
the systray library has 16x16 size hard coded, but our icon should be 18x18
we need to either fork the library to hard code 18x18, or fork the library to allow the size as an argument