[ENHANCEMENT] Warn to user for unfound result of functionlist.

git-svn-id: svn://svn.tuxfamily.org/svnroot/notepadplus/repository/trunk@1131 f5eea248-9336-0410-98b8-ebc06183d4e3
[BUG_FIXED] Fix the error background bug of functionList.

git-svn-id: svn://svn.tuxfamily.org/svnroot/notepadplus/repository/trunk@1132 f5eea248-9336-0410-98b8-ebc06183d4e3