as a user, scenes saved via "save as" do not appear in open dialog until reloading

[kfarr]

user feedback:

• The Saving seems quite wonky to me. To find any saved As scenes, I need to open up 3D Streets in a new Tab. Until I figured that out, I was confused as to where the scenes went.

to reproduce:

• click "remix" or click save > "save as"
• click open
• note that the street you just saved does not appear in the open dialog
• reload the application
• click open
• note that the street you just saved does appear in the open dialog

instead:

• as a user, when I "save as" a file and then click "open" I should see the file

[kfarr]

@ViktoriaShurhot this was marked as done but I don't see a PR so putting it back to in progress

[kfarr]

fix with #378