Implemented support, at the resource file level, for not exporting resource strings for languages that are not supported by a brand.
Refactored code so that primary language and pseudo-locale are always reliably skipped during exportJobs and importJobs operations.
Fixed the import method to always import the pseudo-locale resources, so that it is not required to add it to the list of supported languages.
Added code to the init method to ensure that all brand-specific languages are present in the languages property.
Fixed calculation of steps for progress bar in export method, since we now can omit the primary language and pseudo-locale from the languages list in the config.