From Usability and Translation Improvements (2008-03-26)
In the Editing toool box the "Draw contrained polygon and draw constrained linestring" seems to do basically the same thing od original "Draw polygon" and "Draw linestring". The usage of keyboard keys help to work on Constrained/Unconstrained mode. The only difference is that original "draw polygon" has an option to draw holes which draw const. pol. doesn't have. But now, thanks to Erwan's cut cookie polygon, it is not necessary to have the double of the same drawing tools on the toolbox. I propone to eliminate original "draw polygon" and "draw linestring" to make the toolbox more flexible.