[#181] add maximiser icons to recipe, input and output, and handle maximising of targets accordingly. Desktop view remains as normal, where only output can be maximised

src/web/stylesheets/components/operations/_operations.css

@@ -5,6 +5,10 @@
  * can ( should ) be made into a reusable, generic component
  */
 
+#operations {
+    background-color: var(--primary-background-colour);
+}
+
 #operations-wrapper {
     position: relative;
 }