Can't open the manual and other "help" links (1.0)
#### Steps to reproduce:
When clicked, the "Help" menu items do not open up in browser.
- open Inkscape
- Help > "Inkscape manual"
#### What happened?
an info box pops up:
Traceback (most recent call last):
File "launch_webbrowser.py", line 5, in <module>
from argparse import ArgumentParser
File "/tmp/.mount_inkscaf5gf2j/usr/lib/python2.7/argparse.py", line 86, in <module>
import copy as _copy
File "/tmp/.mount_inkscaf5gf2j/usr/lib/python2.7/copy.py", line 52, in <module>
import weakref
File "/tmp/.mount_inkscaf5gf2j/usr/lib/python2.7/weakref.py", line 14, in <module>
from _weakref import (
ImportError: cannot import name _remove_dead_weakref
#### What should have happened?
Open the website manual pages
#### Inkscape Version and Operating System:
- Inkscape Version: 1.0alpha (inkscape@fb2bebf4919a011f0fd7cec085443d0031228e76, 2019-01-22)
- Operating System: Ubuntu
- Operating System version: 14.04
issue