Integrate icons as SVGs and add new modeling constructs

[SharonNaemi]

Short Description

Currently, the palette icons do not allow the dragstart action. Also the replace menu icons are looking blurred.

Proposed Changes

• integrate all new icons
• add circuit cutting task
• add cutting result combination task

[mbeisel]

Is it really required to add thousands of LOCs for fontello, can the existing svgs not be directly included in the replace menu?

• Some larger icons in the replace menu seem to remove all spacing between the icons and the text
• Some larger icons exceed the spacing in the palette
• It seems like fontello cant handle svgs containing color gradients, e.g., warm-starting icon, again raising the question if the palette and replace menu icons can not be included analogous to the task icons

[mbeisel]

LGTM