[UI] Creation of additional shapes for LWFXEF-based editors
Additional shapes which are needed:
- Circle (maybe a specific form of ellipse)
- Parallelogram (maybe specific form of rectangle)
- Diamond (specific form of parallelogramm)
(from redmine: issue id 3887, created on 2019-12-02, closed on 2020-02-04)
- Relations:
- parent #3878 (closed)