[IMP] web_editor, website: handle currentColor in selectStyle

The goal of this commit is to update the `selectStyle` options to handle
the default CSS `"currentColor"` value.

task-3285817

Part-of: odoo/odoo#142968

addons/web_editor/static/src/js/editor/snippets.options.js

@@ -4060,6 +4060,11 @@ const SnippetOptionWidget = Widget.extend({
                         }
                     }
                 }
+                // When the default color is the target's "currentColor", the
+                // value should be handled correctly by the option.
+                if (value === "currentColor") {
+                    return styles.color;
+                }
 
                 return value;
             }

addons/website/static/src/js/editor/snippets.options.js

@@ -3793,19 +3793,6 @@ options.registry.TextHighlight = options.Class.extend({
             applyTextHighlight(this.$target[0], highlightID);
         }
     },
-    /**
-     * @override
-     */
-    async _computeWidgetState(methodName, params) {
-        const value = await this._super(...arguments);
-        if (methodName === "selectStyle" && value === "currentColor") {
-            const style = window.getComputedStyle(this.$target[0]);
-            // The highlight default color is the text's "currentColor".
-            // This value should be handled correctly by the option.
-            return style.color;
-        }
-        return value;
-    },
 
     //--------------------------------------------------------------------------
     // Handlers