Add VSCode file exclusions

[glekner]

I have an issue in my macOS env where the VSCode IntelliSense would just stop working after some time, I believe it happens because of too much load overtime:

Webpack recompile => public/dist changes => VSCode re-index

this process happens 100s of times a day, and could cause the issue.
This change removes unnecessary files from the watcher and from the explorer.

Removed from watcher:

    "**/bower_components": true,
    "**/node_modules/**": true,
    "**/.cache-loader": true,
    "**/public/dist": true

Removed from files (They won't show on VSCode):

    "**/.cache-loader": true,
    "**/public/dist": true

[rawagner]

/lgtm

[openshift-ci-robot]

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This pull-request has been approved by: glekner, rawagner

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