Add Fix Custom FPS Render Timing Option

Localization/Locale/en.json

@@ -43,6 +43,7 @@
   "ui.render_config.process_audio": "Process Audio",
   "ui.render_config.non_tile": "Non-Tile Mode",
   "ui.render_config.high_res_bloom_correction": "High-Resolution Bloom Correction",
+  "ui.render_config.fix_custom_frame_rate": "Fix Custom FPS Render Timing",
   "ui.render_config.random_seed": "Random Seed (Optional)",
   "ui.render_config.validation_title": "Invalid Settings",
   "ui.render_config.validation_error": "Please check your input values:\n- Width and Height must be integers > 0\n- Render FPS and Video FPS must be > 0\n- Delay After End must be >= 0",