improve UI on new file

assets/src/css/main.css

@@ -329,13 +329,17 @@ fieldset h3 {
   overflow: hidden;
 }
 
-input[type="text"] {
+input {
   border: 0;
   outline: 0;
   background-color: transparent;
   width: 100%;
 }
 
+input[type="submit"] {
+  width: auto;
+}
+
 fieldset input {
   width: calc(100% - 1.57em);
   margin: 0.5em 0;

assets/src/js/browse.js

@@ -89,6 +89,14 @@ $(document).on('page:browse', function() {
       $('.new').data("opened", false);
   });
 
+  $('#new-file-name').off('keypress').keypress(function(event) {
+    if (event.keyCode == 13) {
+      event.preventDefault();
+      $('#new-file-form').submit();
+      return false;
+    }
+  });
+
   $('#new-file-form').submit(function(event) {
     event.preventDefault();
     var value = $('#new-file-name').val(),