tree: file upload with filetype dialog implemented

Also, uses ?fileType=xxx querystring to send the filetype of file.

dist/styles/Login.css

@@ -101,6 +101,17 @@ li#rename  #rename-a{
 #create-node-tooltip .panel-body input {
     min-width: 200px;
 }
+#file-type-tooltip {
+    position : absolute;
+    left : 96px;
+    top:-64px;
+    background-color: white;
+    z-index: 1000;
+
+}
+#file-type-tooltip .panel-body select {
+    min-width: 200px;
+}
 
 li a#rename {
     display:none;