"Lost" changes on window reload

[kieferrm]

1. had a repo open with uncommitted changes
2. opened the extension view to disable an extension for this workspace
3. perform required reload of the window
   -> changes are gone
4. Open Remote Explorer, see changes are in "some other place"
   

[eamodio]

This seems to have been caused by microsoft/vscode@b1b44a3 where the storageUri could change in certain circumstances (including an unresponsive extension host -- which we think is what happened here).

I'm now stripping this new possible suffix from my workspace id, so this will be avoided. I've also opened: microsoft/vscode#128225 so that we could avoid any issues in the future.