Auto-init repo on license, .gitignore select

When a .gitignore or LICENSE file is added, the user is expecting the
repository to be auto-initialized. However, nothing sets the auto_init
value, so it remains at its default. We should set it to checked when
a .gitignore or LICENSE file is added, matching user expectations. If
the user clears .gitignore or LICENSE, it will leave repository creation
enabled. If the user changes the value again, it will re-check the box
if the user has since de-checked it. This behavior is at least
consistent.

Resolves: #11071

Signed-off-by: Alexander Scheel <[email protected]>

Author: cipherboy

web_src/js/index.js

@@ -754,6 +754,23 @@ async function initRepository() {
     });
   }
 
+  // Repo Creation
+  if ($('.repository.new.repo').length > 0) {
+    const markAutoInitialize = function (element) {
+      if (element.value.length > 0) {
+        $('input[name="auto_init"]')[0].checked = true;
+      }
+    };
+
+    $('input[name="gitignores"]').on('change', (evt) => {
+      markAutoInitialize(evt.target);
+    });
+
+    $('input[name="license"]').on('change', (evt) => {
+      markAutoInitialize(evt.target);
+    });
+  }
+
   // Issues
   if ($('.repository.view.issue').length > 0) {
     // Edit issue title