Function printUserSizeSelector

prints the radio button image size selection list

Package: plugins\media
Author: Stephen Billard (sbillard)
Located at zp-extensions/viewer_size_image.php

Parameters summary
`string`	`$text = ''`	text to introduce the radio button list
`string`	`$default = NULL`	the default (initial) for the image sizing
`array`	`$usersizes = NULL`	an array of sizes which may be choosen.