default models inside a map give a badly written path name back

[VinsiGit]

default models inside a map give the path of file back with a \ and not a / or \\

[rvion]

backslashes in typescript are not handled properly in completions

• short term: manually fix all \ to '\' after triggering the completion
• middle term: there will be a proper checkpoint picker soon
• long term: I'll normalize those to / and convert them back at sending time