2.7.0 - A new beginning?

This release includes a few fixes that are minor but are ones that were sorely needed for me. They are as follows:

• The app window will now close when focus is lost, and the icon won't stay highlighted (muan#118)
• The app window will open "tray left" rather than being at the top right of the screen all the time (muan#119)
• emojilib is updated to 2.4.0 to get a new batch of emoji (muan#127)

I would like to make some further updates such as updating to emojilib 3.x, and bringing over more of the updates that people submitted PRs for in the original repo.