Prioritize filetypes containing code in Quick open / Go to file

[richtone]

• VSCode Version: 1.23.1
• OS Version: Windows 10, 1709

Steps to Reproduce:

1. CTRL+P, search for file.
2. If there are multiple files with the same filename, like "abc.bmp", "abc.jpg" and "abc.php" the first 2 are at the top, while file with PHP extension is at the bottom.

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

[vscodebot]

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