Restore WebView state on orientation changes

This fixes #28

app/src/main/java/com/etesync/syncadapter/ui/WebViewActivity.java

@@ -55,7 +55,10 @@ public class WebViewActivity extends BaseActivity {
         mProgressBar = (ProgressBar) findViewById(R.id.progressBar);
 
         mWebView.getSettings().setJavaScriptEnabled(true);
-        mWebView.loadUrl(uri.toString());
+        if (savedInstanceState == null) {
+            mWebView.loadUrl(uri.toString());
+        }
+
         mWebView.setWebViewClient(new WebViewClient() {
             @Override
             public void onPageFinished(WebView view, String url) {
@@ -190,6 +193,12 @@ public class WebViewActivity extends BaseActivity {
         mWebView.saveState(outState);
     }
 
+    @Override
+    protected void onRestoreInstanceState(Bundle savedInstanceState) {
+        super.onRestoreInstanceState(savedInstanceState);
+        mWebView.restoreState(savedInstanceState);
+    }
+
     @Override
     public boolean onKeyDown(int keyCode, KeyEvent event) {
         if (keyCode == KeyEvent.KEYCODE_BACK) {