Merge branch 'master' into Translation
added "ply type" property
added 'strain limits' property
added 'stress limits' property
fix
increased minimum size of widget
added preference dialog
implemented mechanism to change language during runtime
allows to change language during runtime
added more categories
Merge branch 'Translation' of github.com:Negusbuk/MatDB into Translation
implemented change of language during runtime
cosmetics
removed member displayName
fix
update after change of translation file
restored previous version with member displayName
trigger update of categories after change of translation file
update content after change of language
cosmetics