When g:AutoClosePreserveDotReg is set and TERM is tmux, keys should be mapped too.

[yuanjieh]

Tmux 2.1 and later requires TERM to be tmux* to enable italic fonts. However, with TERM=tmux-256color and AutoClose enabled, arrow keys generates ABCD sequences in insert mode.

I fixed this by adding tmux to the list on line 28. Probably we make this official.

(Home and End cause strange uppercase conversion in vim inside tmux, but that is not related to AutoClose.)