Disabled custom tabs for OAuth

app/src/main/java/eu/faircode/email/FragmentOAuth.java

@@ -405,7 +405,7 @@ public class FragmentOAuth extends FragmentBase {
             EmailProvider.OAuth oauth = (graph ? provider.graph : provider.oauth);
 
             SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
-            boolean oauth_tabs = prefs.getBoolean("oauth_tabs", true);
+            boolean oauth_tabs = prefs.getBoolean("oauth_tabs", false);
 
             AppAuthConfiguration.Builder appAuthConfig = new AppAuthConfiguration.Builder();
 

app/src/main/java/eu/faircode/email/FragmentOptionsMisc.java

@@ -2602,7 +2602,7 @@ public class FragmentOptionsMisc extends FragmentBase implements SharedPreferenc
             sbSqliteCache.setProgress(sqlite_cache);
 
             swCacheLists.setChecked(prefs.getBoolean("cache_lists", true));
-            swOauthTabs.setChecked(prefs.getBoolean("oauth_tabs", true));
+            swOauthTabs.setChecked(prefs.getBoolean("oauth_tabs", false));
 
             int start_delay = prefs.getInt("start_delay", 0);
             tvStartDelay.setText(getString(R.string.title_advanced_start_delay, start_delay));