Compress images in setup\assets

Lossless image compression
Compress favicon

Lossless image compression
Compress images in manager\templates\default\

Lossless image compression
Compress images in manager\assets\ext3

Lossless image compression
Compress images in _build

Lossless image compression
Compress images in setup\assets

Lossless image compression
Compress images

* origin/pr/11175:
  Compress images in setup\assets
  Compress images in _build
  Compress images in manager\assets\ext3
  Compress images in manager\templates\default\
  Compress favicon
  Compress images in setup\assets