[BUG_FIXED] Fix "Settings on cloud - Dropbox" not saving problem on the 1st time if the dropbox path has been changed.

git-svn-id: svn://svn.tuxfamily.org/svnroot/notepadplus/repository/trunk@1250 f5eea248-9336-0410-98b8-ebc06183d4e3
[NEW_FEATURE] Add "Setting on Cloud - OneDrive" GUI part.

git-svn-id: svn://svn.tuxfamily.org/svnroot/notepadplus/repository/trunk@1251 f5eea248-9336-0410-98b8-ebc06183d4e3