Moving group controls should not allow anchoring against field controls

[vjekob]

pageextension 70770077 CustomerCardExt extends "Customer Card" { layout { moveafter(Name; Invoicing) } }

This produces strange output: an entire FastTab (Invoicing) is placed inside the "Customer" FastTab, after the field Name.

I believe that moveafter and movebefore should only allow anchoring against same-level elements: if anchor is of type field, then the target should be of type field as well; if anchor is of type group, the target should be of type group as well, and also defined at the same level.

[SBalslev]

Not investing in this