* When you switch an object to gradient fill or stroke, the new
gradient is created with that object's previous fill or stroke color
going from 1 to 0 opacity (instead of the hardcoded black-to-white
fully opaque gradient as before). New objects do not share gradients
now, unless you explicitly set two or more objects to use the same
gradient via the Fill and Stroke dialog.
* The master opacity slider is moved from Object Properties to Fill
and Stroke and can now work on multiple selected objects. It is now
more convenient to adjust the transparency of objects with gradients
* If a node has straight line path fragments on one or both sides,
Ctrl+Alt+dragging that node in the node tool moves it along the
direction(s) of these straight line(s) and their perpendiculars. This
is an easy way to change the length of a straight line without
changing its angle.