Removed name attribute from default tools (ie those from tools.xml), so
that they now get default names, which automatically translated if the
application language is switched.
With this patch, tools.xml no longer contains strings to be translated.
NOTE: Messages.sh was not tested
This patch also removes the slot qualification to AnnotationWidget::applyChanges()
that I had added in "Show the same widget as the annotation properties dialog when
creating annotation tools", because it's not needed any more.
Note that previously the width attrubute was ignored by the PolyLine
engine and it always set width=1, that's why I had to change the default
value in tools.xml.