Supporting (SVG) Sprites

# Feature Request

**Describe the solution you'd like**
I would like to have sprites supported in Bootstrap package as its dramatically lowering the Filerequests and also speed up the pageload by a lot

**Additional context**
In every picture we should be able to select the sprite-image and also these 3 (or 5) attributes for the picture:
1. width
2. height
3. background-position
3.1 background-position-y (alternative to 3.)
3.2 background-position-x (alternative to 3.)

Then all pictures can be replaced by picture sprites.

Note: Sprites are NOT usefull for pictures!!!
Sprites are best practice for Logos/Icons ect like [HERE](https://gtmetrix.com/static/r230/images/sprite.svg) this Sprite-SVG is just 22,3 kb and covers all icons/Logos and just uses one file request. But contains 85 SVG.
So you save 84 file requests.