Subdivided the new icons in 3 size categories. As requested by UX
Used the company naming scheme for uniformity and easy recognition.
Known issues:
- Top/Bottom category wasn't taken into account by UX at the time. Since
this is a recent addition. Both the Walls and Top/Bottom will be updated.
- Cloud/Network connection icons 12px don't render correctly. Due to the
theme-ing.
- Extruder Icons do not render correctly.
CURA-8010_new_icons
