* CMake: Remove dead CODE_HEADER_FILES variable
* CMake: Remove dead COMMAND_CODE_HEADER_FILES and COMMAND_MOC_SOURCE_FILES
* CMake: Remove dead MOC_SOURCE_FILES and FORM_FILES_CPP references
* CMake: Remove dead HEADER_FILES reference
* CMake: Delete unused CustomPCH.cmake superseded by target_precompile_headers
Proxy fields usually reads and transforms data from other sources, usually other Pdm fields. This commit disables IO for proxy fields in the constructor. If XML serialization is required, this must be set on the proxy field, like this
field.xmlCapability()->setIOWritable(true)
field.xmlCapability()->setIOReadable(true)
* Refactor interface to PdmObjectHandle and PdmFieldHandle
Return objects instead of passing in structures as parameters
* Add nodiscard to several functions
* Remove redundant this->
* Rename to ptrReferencedObjectsByType