Fix QR Code Regression.

src/org/thoughtcrime/securesms/VerifyIdentityActivity.java

@@ -57,15 +57,6 @@ public class VerifyIdentityActivity extends KeyScanningActivity {
     super.onDestroy();
   }
 
-  @Override
-  public boolean onOptionsItemSelected(MenuItem item) {
-    switch (item.getItemId()) {
-      case android.R.id.home: finish(); return true;
-    }
-
-    return false;
-  }
-
   private void initializeLocalIdentityKey() {
     if (!IdentityKeyUtil.hasIdentityKey(this)) {
       localIdentityFingerprint.setText(R.string.VerifyIdentityActivity_you_do_not_have_an_identity_key);

src/org/thoughtcrime/securesms/VerifyKeysActivity.java

@@ -46,6 +46,7 @@ public class VerifyKeysActivity extends KeyScanningActivity {
   @Override
   protected void onCreate(Bundle state) {
     super.onCreate(state);
+    getSupportActionBar().setDisplayHomeAsUpEnabled(true);
     setContentView(R.layout.verify_keys_activity);
 
     initializeResources();