Highlighting under cursor broken in vscode 1.24

[d-akara]

• VSCode Version: 1.24
• OS Version: OSX 10.13.4

Steps to Reproduce:
VSCode 1.23 highlighting

VSCode 1.24 highlighting

Does this issue occur when all extensions are disabled?: Yes/No
Yes

[rebornix]

Related #51335 , I suppose it's caused by our newly introduced z-index for decorations. @alexandrudima

[alexdima]

@rebornix I don't think this is related to #51335 at all. It might be caused by 8f0d370#diff-e653ac38a64dd65c7e3f8438feb8a094

[alexdima]

Copy-Paste friendly repro:

{
    "tracers": [
        {
            "name": "request"
        },
        {
            "name": "bar"
        }
    ]
}