[task] Research UnitType attribute - what it is, how it's used

[OriHoch]

research -

• what's the meaning of UnitType attribute in BHP
• how it maps to CM
• where is it used in frontend

var map = {
		0: 'genTreeIndividuals',
		1: 'photoUnits',
    	5: 'places',
    	6: 'familyNames',
    	8: 'personalities',
    	9: 'movies',
    	'IMAGE': 'photoUnits',
    	'VIDEO': 'movies',
    	'TEXT': 'text',
    	'SOUND': 'audio',
    	'3D': '3D',
        'Photographs' : 'photoUnits',
        'Photograph albums' : 'photoUnits',
        'Photographic portraits' : 'photoUnits',
        'Manuscripts': 'text',
	};

	this.get_type = function(item) {
		return "unknown";
		// TODO: how to determine type from CM item / what's the meaning of type
		// var type;
		// if (description_code) {
		// 	type = map[description_code];
		// }
		// else {
		// 	type = 'unknown';
		// }
        //
		// return type;
	};