Fix Dark theme no longer works in main screen on android 5, Issue#1746

Signed-off-by: Durgesh <007durgesh219@gmail.com>

OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/base/BaseActivity.java

@@ -45,8 +45,8 @@ public abstract class BaseActivity extends AppCompatActivity {
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
-        initTheme();
         super.onCreate(savedInstanceState);
+        initTheme();
         initLayout();
         initToolbar();
     }