Problem:    Setting undolevels for one buffer changes undo in another.
Solution:   Make 'undolevels' a global-local option. (Christian Brabandt)

Problem:    Still have old hacking code for Input Method.
Solution:   Add 'imactivatefunc' and 'imstatusfunc' as a generic solution to
            Input Method activation. (Yukihiro Nakadaira)

Problem:    On some systems case of file names is always ignored, on others
            never.
Solution:   Add the 'fileignorecase' option to control this at runtime.
            Implies 'wildignorecase'.

Add missing test files.

Problem:    Windows: IME composition may use a wrong font.
Solution:   Use 'guifontwide' for IME when it is set. (Taro Muraoka)

Problem:    Cannot select beyond 222 columns with the mouse in xterm.
Solution:   Add support for SGR mouse tracking. (Hayaki Saito)

Problem:    'clipboard' "autoselect" only applies to the * register. (Sergey
            Vakulenko)
Solution:   Make 'autoselect' work for the + register. (Christian Brabant)
            Add the "autoselectplus" option in 'clipboard' and the "P" flag in
            'guioptions'.

Problem:    Win32: External commands with special characters don't work.
Solution:   Add the 'shellxescape' option.

Problem:    MS-Windows: 'shcf' and 'shellxquote' defaults are not very good.
Solution:   Make a better guess when 'shell' is set to "cmd.exe". (Ben Fritz)