UI: Extensions: Fix Extension tagline not disabled when it should

The extension tagline of disabled extensions was still showing fully
enabled (white text).

scripts/addons_core/bl_pkg/bl_extension_ui.py

@@ -1208,6 +1208,7 @@ def extensions_panel_draw_impl(
                 col = box.column()
 
                 row = col.row()
+                row.active = is_enabled
 
                 # The full tagline may be multiple lines (not yet supported by Blender's UI).
                 row.label(text=" {:s}.".format(item.tagline), translate=False)