Pybabel translations are now implemented as built-in Flask CLI commands and accessible from 'hawat-cli intl' utility. This approach enables users to easily customize translations for their custom Mentat system installations, or adding new languages. The drawback of this approach is, that the commands are executed within the Flask`s application context, so the application must be properly installed on target system for everything to work properly. I have kept original translation commands in the makefile for future reference.

(Redmine issue: #4789,#4216)