Unable to scroll to heading in file with "%3A" in filename

[jltgroup]

This bug may be the same as the one reported by #58985, but I wasn't too sure.

• VSCode Version: 1.27.2
• OS Version: Win 7 (64 bit)

Steps to Reproduce:

1. Open VSCode

2. Create a new file, and enter the following text:

   # Example
   
   - [Example](#example)
     - [Heading 1](#heading-1)
     - [Heading 2](#heading-2)
   
   ## Heading 1
   
   Irure proident incididunt duis eiusmod anim tempor voluptate consequat.
   
   ## Heading 2
   
   Irure proident incididunt duis eiusmod anim tempor voluptate consequat.

3. Save the file as "Example.md".

4. Using the mouse, press and hold Ctrl and click on the link #heading-2. The application should scroll to "Heading 2" successfully.

5. Now save the file as "Example%3A 1.md".

6. Repeat step 4, the application should fail to scroll, and display the following error message:

   Unable to open 'Example: 1.md': File not found (file:///c:/Example: 1.md).
   

Does this issue occur when all extensions are disabled?: Yes

[vscodebot]

(Experimental duplicate detection)
Thanks for submitting this issue. Please also check if it is already covered by an existing one, like:

• Copy pasting from HEAD version of a file to original causes bugs (#57632)

[mjbvz]

This works for on-disk files in insiders. Untitled files still are broken

[RMacfarlane]

I'm still able to reproduce this issue on this version:

Version: 1.29.0-insider (user setup)
Commit: d7ac6e8
Date: 2018-11-01T06:20:59.729Z