Added token edit modal, refactored map and token data providers

Refactored image drop code into reusable component as well

src/components/token/SelectTokensButton.js

@@ -0,0 +1,38 @@
+import React, { useState } from "react";
+import { IconButton } from "theme-ui";
+
+import SelectTokensIcon from "../../icons/SelectTokensIcon";
+
+import SelectTokensModal from "../../modals/SelectTokensModal";
+
+function SelectTokensButton() {
+  const [isModalOpen, setIsModalOpen] = useState(false);
+  function openModal() {
+    setIsModalOpen(true);
+  }
+  function closeModal() {
+    setIsModalOpen(false);
+  }
+
+  function handleDone() {
+    closeModal();
+  }
+  return (
+    <>
+      <IconButton
+        aria-label="Edit Tokens"
+        title="Edit Tokens"
+        onClick={openModal}
+      >
+        <SelectTokensIcon />
+      </IconButton>
+      <SelectTokensModal
+        isOpen={isModalOpen}
+        onRequestClose={closeModal}
+        onDone={handleDone}
+      />
+    </>
+  );
+}
+
+export default SelectTokensButton;