Revert previous front-end API changes + Cherry-pick fixes from master

This MR reverts changes previously applied to the front-end API, in order to minimize divergence on the front-end side when the new backend is introduced.

This MR furthermore reapplies !377 (merged) and !382 (merged) onto the development branch.

requested review from @holzer

assigned to @da15siwa

marked this merge request as draft

added 1 commit

• 5e6683cf - fix imports

Compare with previous version

marked this merge request as ready

mentioned in merge request !402 (merged)

approved this merge request

mentioned in commit 1e7b4f56

merged