Improvements with EKC, password, and, notifications

[hecaxmmx]

Also this commit add:

• Aligment with Firefox Photon Design and Icons
• Fix some bugs in menus
• Add icons
• Licences
• JSDoc

To test:

• Go to preferences change preferences, password, etc.
• Test Modern Kiosk Mode (fullscreen)
• Test menu in context menu (mouse)
• Disable context menu in preferences
• Test EKC (Ctrl + Shift + U)
• Test to disable password
• Test to change password.

PS.:

• Please see copyright for RacketLogger if not fit, please change in a new commit.
• This will be a legacy version, since firefox --url --kiosk in version 71.0a1 Firefox Nightly

[cpg]

So, we can kill this project when --kiosk is released publicly?

[hecaxmmx]

So, we can kill this project when --kiosk is released publicly?

I think that we can add some improvements to --kiosk and we leave this version for people with less skills on command line.

PS.: I forgot to add some files in this commit, I will add it till Tuesday

Regards