DARK MODE

I love this text editor but I need dark mode. My eyes are dying! It is one of the features that should be there by alpha stage. Please consider this.

[dail8859]

Closing as a duplicate of #407

[Neustradamus]

Linked to:

• Add dark mode (System / Light / Dark theme setting) #1040
• Add theme changer #1029
• Dark Mode #930
• DARK MODE #720
• MacOS Dark Mode #553
• Implemment dark mode #411
• Support Dark Mode #407
• How to change background color #288
• Dark mode #171
• ...