[ur] Sort experimental feature toctree order

Change the order of experimental features in the reStructuredText
`.. toctree::` to be alphabetically sorted. This align the order
experimental features are displayed in the *Experimental Features*
section with the *API Documentation* section.

Author: kbenzie

scripts/templates/exp-features.rst.mako

@@ -5,7 +5,7 @@ import glob
 expdocs = []
 for section in sections:
     foundDocs = glob.glob(section + "/EXP-*.rst")
-    for found in foundDocs:
+    for found in sorted(foundDocs):
         expdocs.append(found)
 %>
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