title: AppCompat v7 Toolbar onOptionsItemSelected not called
body: <p>I changed from the original ActionBar to the AppCompat Toolbar and setSupportActionBar(toolbar).
  When I am using getSupportActionBar() and setDisplayHomeAsUpEnabled(true) for the back arrow, the click never calls onOptionsItemSelected or any other listener method.</p>
  
  <p>Do I have to implement some special listener for it? Befor everything was working just fine.</p>
  
  <p>EDIT:
  Initialise the ActionBar:</p>
  
  <pre><code>mToolbar = (Toolbar) findViewById(R.id.toolbar);
  setSupportActionBar(mToolbar);
  mActionBar = getSupportActionBar();
  mActionBar.setHomeButtonEnabled(true);
  </code></pre>
  
  <p>and after replacing the content with a Fragment I do this:</p>
  
  <pre><code>mDrawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED);
  mDrawerToggle.setDrawerIndicatorEnabled(false);
  mActionBar.setDisplayHomeAsUpEnabled(true);
  </code></pre>