Simplify buttons. Update colour.

Author: microbit-robert

src/board/buttons.ts

@@ -103,7 +103,7 @@ export class Button {
   }
 
   render() {
-    const fill = !!this.state.value ? "#f7febfdd" : "none";
+    const fill = !!this.state.value ? "#00c800" : "#000000";
     this.element.querySelectorAll("circle").forEach((c) => {
       c.style.fill = fill;
     });

src/board/pins.ts

@@ -106,7 +106,7 @@ export class Pin {
 
   render() {
     if (this.ui) {
-      const fill = !!this.state.value ? "#f7febfdd" : "url(#an)";
+      const fill = !!this.state.value ? "#00c800" : "url(#an)";
       this.ui.element.querySelectorAll("path").forEach((p) => {
         if (!p.classList.contains("no-edit")) {
           p.style.fill = fill;