Moved timer tool out of the map controls and into the party controls

src/components/party/StartTimerButton.js

@@ -0,0 +1,32 @@
+import React, { useState } from "react";
+import { IconButton } from "theme-ui";
+
+import StartTimerModal from "../../modals/StartTimerModal";
+import StartTimerIcon from "../../icons/StartTimerIcon";
+
+function StartTimerButton() {
+  const [isTimerModalOpen, setIsTimerModalOpen] = useState(false);
+
+  function openModal() {
+    setIsTimerModalOpen(true);
+  }
+  function closeModal() {
+    setIsTimerModalOpen(false);
+  }
+
+  return (
+    <>
+      <IconButton
+        m={1}
+        aria-label="Start Timer"
+        title="Start Timer"
+        onClick={openModal}
+      >
+        <StartTimerIcon />
+      </IconButton>
+      <StartTimerModal isOpen={isTimerModalOpen} onRequestClose={closeModal} />
+    </>
+  );
+}
+
+export default StartTimerButton;