Character encoding error when adding sub-categories

[johnbillion]

When adding a category under a category parent using the AJAX form under Manage -> Categories, the category parent dropdown list shows a raw HTML code instead of the intended character ("—" is displayed).

To recreate:

1. Go to Manage -> Categories.

2. Add a new category and set its parent to an already existing category.

3. Once the category has been added (via AJAX), select the drop-down box for Category Parent and "—" is displayed as the child marker in error.

[mdawaffe]

fix on #3645

[ryan]

(In [4813]) Update to prototype 1.5.0 and scriptaculous 1.7.0. Fix some AJAXy bits. Props mdawaffe. fixes #3645 #3676 #3519

[mdawaffe]

This is actually still broken.

Patch.

[ryan]

(In [5123]) Fix encoding of cats added over AJAX. Props mdawaffe. fixes #3676