bigger file thumbnail in app sidebar

apps/files/css/detailsView.css

@@ -12,11 +12,11 @@
 }
 
 #app-sidebar .thumbnail {
-	width: 50px;
-	height: 50px;
+	width: 75px;
+	height: 75px;
 	float: left;
 	margin-right: 10px;
-	background-size: 50px;
+	background-size: 75px;
 }
 
 #app-sidebar .ellipsis {
@@ -27,7 +27,8 @@
 
 #app-sidebar .fileName {
 	font-size: 16px;
-	padding-top: 3px;
+	padding-top: 13px;
+	padding-bottom: 3px;
 }
 
 #app-sidebar .file-details {

apps/files/js/mainfileinfodetailview.js

@@ -125,8 +125,8 @@
 						path: this.model.getFullPath(),
 						mime: this.model.get('mimetype'),
 						etag: this.model.get('etag'),
-						x: 50,
-						y: 50,
+						x: 75,
+						y: 75,
 						callback: function(previewUrl) {
 							$iconDiv.css('background-image', 'url("' + previewUrl + '")');
 						}