Duplicate pattern option redundant for Scatter extension

Migrated from https://bugs.launchpad.net/inkscape/+bug/1733228

Steps to reproduce:

• Open Inkscape
• Draw a rectangle and convert to path
• Draw a long line
• Select both
• Go to menu Extensions > Generate from Path > Scatter
• Apply

What happened?

• Duplicate pattern before deformation does nothing
• We already have Original pattern will be: (Moved | Copied | Cloned)
• Comment in pathscatter.py TODO: allow 4th option: duplicate the first copy and clone the next ones.

What should have happened?

• Remove the duplicate pattern option.
  • Maybe it could interact with the "Original pattern will be" option, but it's probably better just to add a fourth option to (Moved | Copied | Cloned)

Version Info:

• Still in Inkscape 1.1-rc (f8a4456a53, 2021-05-09), and extensions at trunk
• Originally reported in Inkscape 0.92.2 5c3e80d, 2017-08-06 on Arch Linux under Gnome 3