Converted cron_upload to be able to run per-user, using user API keys

ext/cron_uploader/script.js

@@ -0,0 +1,7 @@
+function copyInputToClipboard(inputId) {
+    // Referenced from https://www.w3schools.com/howto/howto_js_copy_clipboard.asp
+    let source = document.getElementById(inputId);
+    source.select();
+    source.setSelectionRange(0, 99999); /*For mobile devices*/
+    document.execCommand("copy");
+}