Open Recent is broken on Windows (wrong path separator?)

[julianrendell]

File menu -> Open Recent -> entries are listed as eg /D:/Meshroom_Dev/test-project/mostree.mg

Clicking on an entry results in:

[2020-05-23 16:12:48,660][ERROR] Traceback (most recent call last):
  File "D:\Meshroom_Src\meshroom\meshroom\ui\reconstruction.py", line 432, in load
    super(Reconstruction, self).load(filepath, setupProjectFile)
  File "D:\Meshroom_Src\meshroom\meshroom\ui\graph.py", line 314, in load
    g.load(filepath, setupProjectFile)
  File "D:\Meshroom_Src\meshroom\meshroom\core\graph.py", line 247, in load
    with open(filepath) as jsonFile:
OSError: [Errno 22] Invalid argument: '/D:/Meshroom_Dev/test-project/mostree.mg'

Path should be D:\Meshroom_Dev\test-project\mostree.mg.

Exception dialog can be closed, and the program is still usable; can manually open the project using file->open.

[skinkie]

https://stackoverflow.com/questions/2953834/windows-path-in-python