When a new tab is created is also selected

Previously it was selected always the last tab because the action
sequence was:

 - create the new tab (in the last position)
 - select the new tab index (last)
 - sort the tabs (the new tab is now in the middle but the selected
   is always the last)

instead the correct action sequence is

 - create the new tab (in the last position)
 - sort the tabs (now the new tab is in the middle)
 - select the new tab index (now the correct index is selected)

app/src/processing/app/Editor.java

@@ -1711,6 +1711,7 @@ public class Editor extends JFrame implements RunnerListener {
   protected void addTab(SketchFile file, String contents) throws IOException {
     EditorTab tab = new EditorTab(this, file, contents);
     tabs.add(tab);
+    reorderTabs();
   }
 
   protected void removeTab(SketchFile file) throws IOException {

app/src/processing/app/EditorHeader.java

@@ -323,7 +323,6 @@ public class EditorHeader extends JComponent {
     if (sketch != null) {
       menu.addSeparator();
 
-      editor.reorderTabs();
       int i = 0;
       for (EditorTab tab : editor.getTabs()) {
         SketchFile file = tab.getSketchFile();