"files to include" doesn't work with folder names containing glob characters

Issue Type: <b>Bug</b>

1. Create a workspace add the following folder, plus couple of other folders

```
//...
    {
      "path": "C:\\Users\\...\\folder1",
    },
    {
      "path": "C:\\Users\\...\\folderNamed",
      "name": "folderNamed (Special Folder)"
    },
    {
      "path": "C:\\Users\\...\\folder2",
    }
//...
```
2. go to explorer view tab
3. create same file with `lorem-ipsum` text in all the folders
4. right click on the `folderNamed (Special Folder)`
5. click on `File in Folder...`
6. ensure that **files to include** set as `./folderNamed (Special Folder)`
7. type `lorem` in the folder into the **Search** box
8. you will see that it retrieves from **folder1** and **folder2** too

where it should only retrieve from `folderNamed (Special Folder)`.
behaviour works fine on `folder1` and `folder2` since they are not named.

VS Code version: Code 1.39.1 (88f15d17dca836346e787762685a40bb5cce75a8, 2019-10-10T23:31:28.683Z)
OS version: Windows_NT x64 10.0.18362

<details>
<summary>System Info</summary>

|Item|Value|
|---|---|
|CPUs|Intel(R) Core(TM) i9-9900K CPU @ 3.60GHz (16 x 3600)|
|GPU Status|2d_canvas: enabled<br>flash_3d: enabled<br>flash_stage3d: enabled<br>flash_stage3d_baseline: enabled<br>gpu_compositing: enabled<br>multiple_raster_threads: enabled_on<br>native_gpu_memory_buffers: disabled_software<br>oop_rasterization: disabled_off<br>protected_video_decode: unavailable_off<br>rasterization: enabled<br>skia_deferred_display_list: disabled_off<br>skia_renderer: disabled_off<br>surface_synchronization: enabled_on<br>video_decode: enabled<br>viz_display_compositor: disabled_off<br>webgl: enabled<br>webgl2: enabled|
|Load (avg)|undefined|
|Memory (System)|63.81GB (39.06GB free)|
|Process Argv||
|Screen Reader|no|
|VM|0%|
</details><details><summary>Extensions (86)</summary>

Extension|Author (truncated)|Version
---|---|---
better-comments|aar|2.0.5
markdown-imsize|amo|0.0.2
azds|azu|1.0.120191007
emojisense|bie|0.5.3
markdown-mermaid|bie|1.3.0
path-intellisense|chr|1.4.2
vscode-markdownlint|Dav|0.31.0
vscode-eslint|dba|1.9.1
githistory|don|0.4.6
xml|Dot|2.5.0
gitlens|eam|10.1.1
EditorConfig|Edi|0.14.1
prettier-vscode|esb|2.3.0
auto-close-tag|for|0.5.6
auto-rename-tag|for|0.1.0
dotnet-test-explorer|for|0.7.1
vscode-pull-request-github|Git|0.12.0
mdmath|goe|2.4.0
cloudcode|goo|0.0.12
asciidecorator|hel|0.2.0
rest-client|hum|0.22.2
ftp-simple|hum|0.7.4
reg|ion|1.0.1
markdown-extended|jeb|1.0.13
markdown-extension-pack|jeb|0.0.3
plantuml|jeb|2.12.1
super-replace|jeb|0.3.1
sharppad|jma|1.1.0
vscode-peacock|joh|3.1.5
vscodeilviewer|jos|0.0.1
jq-syntax-highlighting|jq-|0.0.2
docomment|k--|0.1.8
wordcounter|kir|1.9.3
rainbow-csv|mec|1.3.1
azure-pipelines|ms-|1.157.4
vscode-apimanagement|ms-|0.1.1
vscode-azureappservice|ms-|0.16.0
vscode-azureeventgrid|ms-|0.1.1
vscode-azurefunctions|ms-|0.18.1
vscode-azurestorage|ms-|0.7.2
vscode-cosmosdb|ms-|0.11.0
vscode-docker|ms-|0.8.1
vscode-logicapps|ms-|0.2.18
vscode-kubernetes-tools|ms-|1.0.4
mssql|ms-|1.6.0
sqlops-debug|ms-|1.3.0
vscode-postgresql|ms-|0.2.0
remote-containers|ms-|0.81.0
remote-ssh|ms-|0.47.1
remote-ssh-edit|ms-|0.47.1
remote-ssh-explorer|ms-|0.47.1
remote-wsl|ms-|0.39.9
vscode-remote-extensionpack|ms-|0.17.0
autorest|ms-|2.0.1
azure-account|ms-|0.8.6
azurecli|ms-|0.4.6
csharp|ms-|1.21.4
github-issues-prs|ms-|0.9.1
Go|ms-|0.11.7
mono-debug|ms-|0.15.8
powershell|ms-|2019.9.0
vscode-node-azure-pack|ms-|0.0.9
vscode-typescript-tslint-plugin|ms-|1.2.2
vsliveshare|ms-|1.0.950
vsliveshare-audio|ms-|0.1.66
team|ms-|1.149.2
azurerm-vscode-tools|msa|0.7.0
debugger-for-chrome|msj|4.12.0
color-highlight|nau|2.3.0
vscode-versionlens|pfl|0.24.0
material-icon-theme|PKi|3.9.1
quicktype|qui|12.0.46
vscode-yaml|red|0.5.3
elastic|ria|0.13.3
vscode-odata|sta|0.1.0
vscode-markdown-paste-image|tel|0.12.3
usql-vscode-ext|usq|0.2.15
vscodeintellicode|Vis|1.1.9
application-insights|Vis|0.4.2
vscode-redis|vit|1.2.0
azure-iot-edge|vsc|1.17.0
azure-iot-toolkit|vsc|2.10.0
vscode-ansible|vsc|0.5.2
WebTemplateStudio-dev-nightly|WAS|0.0.1925201
vscode-todo-highlight|way|1.0.4
t4-support|zbe|0.4.3


</details>
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