Improve the accessibility of our modals (the color picker and the export dialog)
Implement a focus trap so that tapping through the controls inside them don't escape to outer elements, it also allows to close the modals with the "Escape" key.
* 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
Unfortunately, react-color has a bug where transparent color doesn't trigger onChange. I've been annoyed by the huge dependency anyway so decided to take the generated html (which is awesome) and reimplement a specific component for it.
I also made sure that we don't actually render anything when the background is transparent on rough (I looked at the generated path and made sure it didn't have the commands for the background)
