[code] Fixed Script edition cursor bugs.

The scroll is now reloaded when text is inserted or a new line is
entered. When opening a script, the cursor moves to the end of the
script.

Change-Id: I027ea80db485916fc3fc962cfa9e032ca0bbc81e

apps/code/editor_controller.cpp

@@ -29,6 +29,10 @@ void EditorController::didBecomeFirstResponder() {
   app()->setFirstResponder(&m_textArea);
 }
 
+void EditorController::viewWillAppear() {
+  m_textArea.moveCursor(strlen(m_textArea.text() - m_textArea.cursorLocation()));
+}
+
 void EditorController::viewDidDisappear() {
   m_scriptParameterController->scriptContentEditionDidFinish();
 }