Window manager activity causes colors to get reset, if "dim text when inactive" is enabled

[blueyed]

I have noticed a problem with different terminal emulators, where the colors get reset on window manager activities (typically clicking the window title or Alt-tabbing away).

Initial:

After clicking the window title or Alt-Tabbing:

LilyTerm is only affected if the "Dim text when inactive" option (under "Misc") is enabled (which is the default).

(for the initial report with more information, see morhetz/gruvbox#13)

(this affects the latest release and Git master)