On creating a new window in Shell, switch to it.
[modest] / src / gtk /
drwxr-xr-x   ..
-rw-r--r-- 2155 Makefile.am
-rw-r--r-- 31267 modest-gtk-window-mgr.c
-rw-r--r-- 3486 modest-gtk-window-mgr.h
-rw-r--r-- 5497 modest-icon-names.h
-rw-r--r-- 65339 modest-platform.c
-rw-r--r-- 10688 modest-shell-window.c
-rw-r--r-- 3104 modest-shell-window.h
-rw-r--r-- 8828 modest-shell.c
-rw-r--r-- 3193 modest-shell.h