Update 2.4.0

What new:

• New currency converter fragment (need create your own token)
• New Tiles in Control center (may have bugs and ROOT required)
• Updated Update center
• Updated Design libs
• Added Timer in Expanded Toolbar
• Save Stargazer's QR Code
• Bugs fixed and new ones added

It's a last update in this year. Happy New Year guys!

Full Changelog: 2.3.0...2.4.0