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
