Update default settings and enhance ConfirmingPage logic

- Changed default settings to enable two-way and one-shot sync, disable notifications and sync fallback, and adjust confirmation behavior.
- Improved ConfirmingPage to conditionally display the Abort button and update the Accept button text based on the presence of changes in the patch tree.
- Updated logging level in SyncbackStats to warn for better visibility on debug logging hints.

src/syncback/stats.rs

@@ -240,7 +240,7 @@ impl SyncbackStats {
 
         // Helpful hint about debug logging
         if duplicate_count > 0 || rbxm_count > 0 {
-            log::info!(
+            log::warn!(
                 "    Enable debug logging (RUST_LOG=debug) to see individual instance details"
             );
         }