Comment 8 for bug 1521062

Seth seem to have taken this, thanks to him for that. For everyone's information: this seems to be a very common question in the forums. Searching for "repeat subcircuit", "duplicate layout", "replicate layout" and some other related phrases gives maybe tens of threads. Here are some:

https://forum.kicad.info/t/how-to-repeat-multiple-layout-blocks/14560 (The latest)
https://forum.kicad.info/t/replicate-layout-action-plugin/8539 (Important. Seth has taken part in this discussion)
https://forum.kicad.info/t/repeating-the-same-layout-for-identical-subcircuits/5092
https://forum.kicad.info/t/how-to-duplicate-a-pcb-layout-in-kicad-5/12909
https://forum.kicad.info/t/duplicating-part-of-a-layout/9789
https://forum.kicad.info/t/set-same-layout-for-all-hierarchical-sheets/6346