We did some hackery to prevent copy pasting when we didn't support multilines. But we do now so we can remove it.
Interestingly, newlines are actually <br /> elements. So we need to tweak the isInputLike logic a bit
By using position: fixed like the rest of the UI components, it will no longer make the body change size and have bad side effects like scrolling.
Fixes#365
* Redisign idea
* Code cleanup
* Fixed to right container
* Reoredered layout
* Reordering panels
* Export dialog
* Removed redunant code
* Fixed not removing temp canvas
* Fixed preview not using only selected elements
* Returned file name on export
* Toggle export selected/all elements
* Hide copy to clipboard button if no support of clipboard
* Added border to swatches
* Fixed modal flickering
* Extract app component from entrypoint (index)
- Use refs to refer to canvas and rough context
- Remove ReactDOM double rendering
* Extract keys and key related utils into their own module
* Move everything back to entrypoint
