If I change to e.g. $config['product_name'] = "My-Office"; Theme Group Office will not work correct any more. Calendar breaks and also symbols of the default theme are take insted of the right once for Group-Office theme.
You are also not able to choose "Group-Office" theme in the preferences, by choosing "My-Office" because the name changes there too.
Coping "views/Extjs3/theme/Group-Office" to "views/Extjs3/theme/My-Office" does not change the broken Calender and icons