Currently there is a lot of source code churn. This leads to non-substantive
differences in the glabels translation files, complicating merges and commits.
* Fix typos in translatable strings
* Add language definitions to ukrainian ts files
* Add acknowledgements for previous translators of v3.x
* Cleaning the translations
* Map the last commit to the translation files list
* Add instructions for translators
Mario Blättermann
Jim Evins