[ENHANCEMENT] Enhance sort feature in function list.

git-svn-id: svn://svn.tuxfamily.org/svnroot/notepadplus/repository/trunk@1134 f5eea248-9336-0410-98b8-ebc06183d4e3
[ENHANCEMENT] Enhance GUI in function list (in progress).

git-svn-id: svn://svn.tuxfamily.org/svnroot/notepadplus/repository/trunk@1135 f5eea248-9336-0410-98b8-ebc06183d4e3