change folder icon when dragging over a directory

apps/files/css/files.css

@@ -77,6 +77,10 @@
 	background-color: rgb(179, 230, 255);
 }
 
+.dropping-to-dir .thumbnail {
+	background-image: url(/nextcloud/core/img/filetypes/folder-drag-accept.svg)!important;
+}
+
 /* icons for sidebar */
 .nav-icon-files {
 	background-image: url('../img/folder.svg');

apps/files/js/file-upload.js

@@ -667,11 +667,22 @@ OC.Upload = {
 						OC.Upload._hideProgressBar();
 					}
 				});
-				fileupload.on('fileuploaddragover', function(){
+				fileupload.on('fileuploaddragover', function(e, data){
 					$('#app-content').addClass('file-drag');
+
+					var filerow = $(e.delegatedEvent.target).closest('tr');
+
+					if(!filerow.hasClass('dropping-to-dir')){
+						$('.dropping-to-dir').removeClass('dropping-to-dir');
+					}
+
+					if(filerow.attr('data-type') === 'dir'){
+						filerow.addClass('dropping-to-dir');
+					}
 				});
-				fileupload.on('fileuploaddragleave fileuploaddrop', function (){
+				fileupload.on('fileuploaddragleave fileuploaddrop', function (e, data){
 					$('#app-content').removeClass('file-drag');
+					$('.dropping-to-dir').removeClass('dropping-to-dir');
 				});
 			} else {
 				// for all browsers that don't support the progress bar

apps/files/js/filelist.js

@@ -2528,9 +2528,7 @@
 					return false;
 				}
 
-				console.log(e);
 				var dropTarget = $(e.delegatedEvent.target);
-				console.log(dropTarget);
 
 				// check if dropped inside this container and not another one
 				if (dropTarget.length