Class CaixaTextoWidget refactored to TextboxWidget.
Merge pull request #87 from babs/code-refactoring-trans-fr

Updated fr_FR translations
Class ClassOperadoresWidget refactored to OperatorClassWidget.
Class CodigoFonteWidget refactored to SourceCodeWidget.
Class ColunaWidget refactored to ColumnWidget.
Class ConfBaseWidget refactored to BaseConfigWidget. Pending comment
translation.
Updated fr_FR translation