Unread badge favicon

[HaydenBL]

I recently started using Telegram, and it's pretty good but I was getting a bit frustrated with the unread favicon indicator in the webapp. Most other chat webapps I use make it a little more obvious when you have a notification, whereas Telegram just has a mail icon with the same color scheme.

I did some Googling and found I was not the only one with this problem:

#1585
#1718

So this PR hopefully solves this issue! I was originally just gonna make it a red dot, but I saw in the one issue someone mentioned adding a count to the badge, so I figured I might as well do that while I'm messing around here.

Here's a picture of what it looks like in a tab:

Let me know if something needs fixing!

[HaydenBL]

Actually now that I'm actually taking time to read the gulpfile I'm thinking I might not need to add that since it just puts those files into the top level when you build. I'll await confirmation on whether or not I need to do anything there.

Also, since I forgot to mention this in the initial PR description, I also stopped the badge/title from flashing since it's unnecessary when the badge is there, and if anything would be kinda distracting with a red dot.