Made some usability changes on my fork

[alyssadev]

https://github.com/alyssadev/TwitchChatVideo

• Set the default font style to Bold, this was more readable with fonts like Inter which is what Twitch uses for their chat in their web UI. Ideally font style would be another dropdown choice.
• Add fix for crash if user enters width/height that is not a multiple of two. This fix subtracts 1 from the user's entered resolution so the resulting resolution won't cause ffmpeg to exit unexpectedly
• Commented out BTTV/FFV emote functions; these don't appear to work at the moment.
• Added taskbar progress to match the progress bar on the app (adds dependency on WindowsAPICodePack)

Feel free to pull any changes to here if you like.