Add Segmented Control UI for Output Mode Option

Localization/Locale/en.json

@@ -36,6 +36,9 @@
   "ui.render_config.sample_rate": "Sample Rate (Hz)",
   "ui.render_config.channels": "Audio Channels",
   "ui.render_config.audio_bitrate": "Audio Bitrate (kbps)",
+  "ui.render_config.output_mode": "Output Mode",
+  "ui.render_config.output_mode_video": "Video",
+  "ui.render_config.output_mode_png_sequence": "PNG Sequence",
   "ui.render_config.output_dir": "Output Directory",
   "ui.render_config.browse": "Browse...",
   "ui.render_config.reset_default": "Reset to Default",