Plugin: iframe issue in IE8

[Robert Xee]

When adding a plugin like this (with fixed height):

CKEDITOR.plugins.add('uploader',{
    requires: ['iframedialog'],
    init:function(a){
        CKEDITOR.dialog.addIframe('upload_dialog', 'File Uploader','classes/uploaders/fck_bestand.php',550,400,function(){/*oniframeload*/})
        var cmd = a.addCommand('uploader', {exec:uploader_onclick})
        cmd.modes={wysiwyg:1,source:1}
        cmd.canUndo=false
        a.ui.addButton('uploader',{ label:'Upload a File..', command:'uploader', icon:this.path+'images/icon.png' })
    }
})

The iframe's height is not correct in IE8 (screenshot).

[Minh Nguyen]

DUP of #4863