Wpf update. Core Features done, but does not look beautifull yet :D

[MaMilaCan]

[UPDATE] Core features are done. Selecting file or multiple files, Loading, selecting languages, saving, colors for (Ok, changed, not done), changetracking, copy paste of full rows, group by (project, group by status, or both), search in id and filter, search in all and filter, UI language change (need tabler restat once) prepared the following features: toggle save no empty language blocks (current default: false, dont save empty), undo action, reset action, update tabler, settings window