Remove transition from last color element

Fix broken comparison option, fixes #286

Author: simonwep

dist/pickr.es5.min.js

@@ -293,7 +293,7 @@ export default class Pickr {
 
                     // Check if color is locked
                     if (!options.comparison) {
-                        _root.button.style.color = cssRGBaString;
+                        _root.button.style.setProperty('--pcr-color', cssRGBaString);
 
                         // If the user changes the color, remove the cleared icon
                         _root.button.classList.remove('clear');

dist/pickr.es5.min.js.map

@@ -24,7 +24,6 @@
 
             .pcr-last-color {
                 cursor: pointer;
-                transition: background-color 0.3s, box-shadow 0.3s;
                 border-radius: 0.15em 0.15em 0 0;
                 z-index: 2;
             }