Revert massive replacement of empty list creation sentences. The use of '[list]' instead of '{}' adds semantics that could be used for performance improvements in the future, such as using a different internal representation. There is already work in this direction, avoiding the generation of the string representation during comparison of empty strings (huge thanks to Stefan Sobernig for the pointer: https://core.tcl.tk/tcl/info/44527c632ed609c2).
- Allowing to upload new version of resource files. It doesnt matter wich mime_type the resource has.- Allowing to edit names of learning objects.- Showing which version of the resource is the live version in some listbuilders.- Fixing some typos.