+ Added localization markers for errors
Plater: load_files() : Check for type_zip_amf and prusa is removed from conditions (it doesn't used as project's extensions anymore).
+ ModelProcessing: Some functions, like delete zero object, detection if model need to be converted from other units or looks like multipart are moved inside load_model() and theirs return values are written in load statistics, which have to be used by UI later.
