1. Change some shapes to apply correctly the color presets:
e.g. the default color of the shape erased the background
color of the preset.
2. Improve some shapes to have a better render by changing
the colors and/or adding animations.
3. Some svgs could give the same result. To have a clean list,
many svgs were combined.
4. Letting the old svg files to assure the compatibility with themes.
5. Improve the preview of some shapes for a better reading.
Part of #70843
task-2319488
Brieuc-brd
50458a208d