Make window frameless, update tray info

[aymxdd]

• Added a tray icon and tray menu to restore the app when "closed"
• Polished the design with a frame less window and some stylised control buttons
• Removed that ugly and useless top menu bar on windows

[cassidoo]

One nitpick thing, the whole project uses 2 spaces instead of 4, mind fixing?

[farskid]

The space issue could be solved by adding an .editorconfig file to the root directory of project. Would happily add it if needed.

[aymxdd]

Yeah you can do it ! I never used a config file for that, I just use beautify on Atom for my indentation :)

[farskid]

The thing is, linters and config files help, improve consistency across the team :)

[cassidoo]

Going to test this on Windows when I get home and review after that. :)

[cassidoo]

A few issues on Mac.
Tray icon is super large, plus the X and _ buttons on Mac are usually on left. You can also scroll down and not see the buttons. Not sure if a frameless window is the best idea. Plus, if you go for a frameless window, on Windows there still needs to be some way to have a menu. Open to ideas here.

[aymxdd]

All right, will fix theses issues asap !