* Add cancel hint to Eyedropper tool
* Improve eyedropper overlay CSS
* Make CSS for transparent checkered background reusable
* Add color choice preview to color picker
* Draw text and markers as contrasting white or black
* Add reactive color updating and new/initial swapping
* Add Hex, RGB, HSV, and Opacity inputs
* Add none color and preset buttons
* Add eyedropper button and fix alignment (now visually done)
* Wire up none colors through the backend and style the ColorInput widget
* Add color info chip to ColorInput widget
* Fix all UX bugs
* Add more tooltips
* Fix FloatingMenu recursive loop
* Prevent mouse stray from closing color picker while dragging pickers
Closes#703
* Fix deselect all layers shortcut
* Add temporary eyedropper for Chromium browsers and a coming soon fallback
Major CSS improvements to layout at small screen sizes. By adding min-width: 0 and min-height: 0 on the nested display: flex structure, widgets no longer coerce the whole layout into large-scale resizing. Scrollbars are now used to allow correct overflowing of the tab bar (fixes#177), Document Panel options bar, and tool shelf. Improvements to responsive resizing are also included for viewing the UI correctly on mobile now. Additional small fixes to styling of widget colors and corner roundness. The ruler has been darkened one shade to improve text contrast and aesthetics.
