🐛 Fixed tag slug not auto-matching tag title when creating new tag

refs 08b099e527

- when the use of scratch values was removed a bug was introduced where only the first character of the tag title was used to set the slug when typing
- bug was caused because previously we were checking against the original `tag.slug` value which wouldn't have been set yet because we were setting scratch values instead
- updated the code to explicitly mark the slug value as being set manually if it's edited directly so the auto-update logic can use that to skip updates instead of comparing against old/unset values

ghost/admin/app/components/tags/tag-form.js

@@ -117,10 +117,8 @@ export default class TagForm extends Component {
             newValue = newValue.trim();
         }
 
-        tag[property] = newValue;
-
         // Generate slug based on name for new tag when empty
-        if (property === 'name' && !tag.slug && tag.isNew) {
+        if (property === 'name' && tag.isNew && !this.hasChangedSlug) {
             let slugValue = slugify(newValue);
             if (/^#/.test(newValue)) {
                 slugValue = 'hash-' + slugValue;
@@ -128,6 +126,13 @@ export default class TagForm extends Component {
             tag.slug = slugValue;
         }
 
+        // ensure manual changes of slug don't get reset when changing name
+        if (property === 'slug') {
+            this.hasChangedSlug = !!newValue;
+        }
+
+        tag[property] = newValue;
+
         // clear validation message when typing
         tag.hasValidated.addObject(property);
     }