UI-1224: Access brand/model images directly in the template

submodules/devices/devices.css

@@ -246,7 +246,6 @@
 	float: left;
 	font-size: 18px;
 	font-weight: bold;
-	height: 80px;
 	line-height: 80px;
 	margin-left: 40px;
 }

views/devices-sip_device.html

@@ -2,7 +2,7 @@
 	<div class="title-bar clearfix">
 		<div class="device-title pull-left">
 			{{#if provision}}
-			<div class="device-image model-image {{toLowerCase provision.endpoint_brand}}-{{toLowerCase provision.endpoint_family}}-{{toLowerCase provision.endpoint_model}}"></div>
+			<div class="device-image model-image" style="background-image: url('css/assets/models/{{toLowerCase provision.endpoint_brand}}_{{toLowerCase provision.endpoint_family}}_{{toLowerCase provision.endpoint_model}}.jpg');"></div>
 			<div class="device-model">{{provision.endpoint_brand}} - {{provision.endpoint_model}}</div>
 			{{else}}
 				<div class="device-icon">