[ENHANCEMENT] change the icon buttons of functionlist.

git-svn-id: svn://svn.tuxfamily.org/svnroot/notepadplus/repository/trunk@1136 f5eea248-9336-0410-98b8-ebc06183d4e3
[BUG_FIXED] Fix sort settings bug in function list while reloading.

git-svn-id: svn://svn.tuxfamily.org/svnroot/notepadplus/repository/trunk@1137 f5eea248-9336-0410-98b8-ebc06183d4e3