Translations:Release notes 0.19/151/en

Forum discussion, pull request 2680, commit a7d9661b1d.
 * TechDraw_Dimension_Horizontal_Extent_example.png
 * New TechDraw HorizontalExtentDimension and TechDraw VerticalExtentDimension, to obtain the maximum dimensions in a view.
 * New TechDraw HorizontalExtentDimension and TechDraw VerticalExtentDimension, to obtain the maximum dimensions in a view.