fix MessageDetailsActivity home button

// FREEBIE

AndroidManifest.xml

@@ -125,10 +125,7 @@
               android:label="Message Details"
               android:windowSoftInputMode="stateUnchanged"
               android:launchMode="singleTask"
-              android:configChanges="touchscreen|keyboard|keyboardHidden|orientation|screenLayout|screenSize"
-              android:parentActivityName=".ConversationListActivity">
-        <meta-data android:name="android.support.PARENT_ACTIVITY" android:value=".ConversationListActivity" />
-    </activity>
+              android:configChanges="touchscreen|keyboard|keyboardHidden|orientation|screenLayout|screenSize"/>
 
     <activity android:name=".GroupCreateActivity"
           android:windowSoftInputMode="stateVisible"

src/org/thoughtcrime/securesms/MessageDetailsActivity.java

@@ -25,6 +25,7 @@ import android.support.v4.app.LoaderManager.LoaderCallbacks;
 import android.support.v4.content.Loader;
 import android.util.Log;
 import android.view.LayoutInflater;
+import android.view.MenuItem;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.ListView;
@@ -80,6 +81,7 @@ public class MessageDetailsActivity extends PassphraseRequiredActionBarActivity
 
     initializeResources();
 
+    getSupportActionBar().setDisplayHomeAsUpEnabled(true);
     getSupportLoaderManager().initLoader(0, null, this);
   }
 
@@ -199,6 +201,17 @@ public class MessageDetailsActivity extends PassphraseRequiredActionBarActivity
     recipientsList.setAdapter(null);
   }
 
+  @Override
+  public boolean onOptionsItemSelected(MenuItem item) {
+    super.onOptionsItemSelected(item);
+
+    switch (item.getItemId()) {
+      case android.R.id.home: finish(); return true;
+    }
+
+    return false;
+  }
+
   private class MessageRecipientAsyncTask extends AsyncTask<Void,Void,Recipients> {
     private WeakReference<Context> weakContext;
     private MessageRecord          messageRecord;