Revert "Add yet-another-react-lightbox package and update .gitignore to exclude node_modules"

This reverts commit c92f4a5edd.

frontend/node_modules/flatpickr/dist/esm/utils/index.js

@@ -0,0 +1,17 @@
+export var pad = function (number, length) {
+    if (length === void 0) { length = 2; }
+    return ("000" + number).slice(length * -1);
+};
+export var int = function (bool) { return (bool === true ? 1 : 0); };
+export function debounce(fn, wait) {
+    var t;
+    return function () {
+        var _this = this;
+        var args = arguments;
+        clearTimeout(t);
+        t = setTimeout(function () { return fn.apply(_this, args); }, wait);
+    };
+}
+export var arrayify = function (obj) {
+    return obj instanceof Array ? obj : [obj];
+};