Added build script, fixed windows build using mkdirp, improved README

Add styling capabilities to DrawSupport

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Fix 4305 builder changes

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add delete confirm modal to builder

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implement some points added to the issue

* Rename Column title, to Immersive Content
* change tooltip text and icons (chevron-left, down) of collapse/expand button to  "Expand All"/"Compress All"
* When empty view:
* all buttons in builder toolbar are disabled
* add a gray background on the right
* add No Contents Available string in the left panel
* add a gray line under the toolbar
* Change icon drag and drop, (small burger menu)
* Each title must be customizable, also add onBlur events for state updates and use internal state

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Changes to Error Boundary

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#	web/client/components/app/StandardApp.jsx

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remove dead code

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updates to error boundary