wmbutton: fail early on missing config
tree118c67043032e28e47353d8b5184351da7dd88ef
drwxr-xr-x - AlsaMixer.app
drwxr-xr-x - Temperature.app
drwxr-xr-x - wmCalClock
drwxr-xr-x - wmMatrix
drwxr-xr-x - wmSMPmon
drwxr-xr-x - wmWeather
drwxr-xr-x - wmacpi
drwxr-xr-x - wmacpiload
drwxr-xr-x - wmauda
drwxr-xr-x - wmbatteries
drwxr-xr-x - wmbiff
drwxr-xr-x - wmbutton
drwxr-xr-x - wmcalendar
drwxr-xr-x - wmckgmail
drwxr-xr-x - wmcpuload
drwxr-xr-x - wmfemon
drwxr-xr-x - wmfu
drwxr-xr-x - wmifinfo
drwxr-xr-x - wmitime
drwxr-xr-x - wmix
drwxr-xr-x - wmkeys
m--------- - wmmixer-alsa-0.6
drwxr-xr-x - wmmixer
drwxr-xr-x - wmmon
drwxr-xr-x - wmmoonclock
drwxr-xr-x - wmnet
drwxr-xr-x - wmnotify
drwxr-xr-x - wmpager
drwxr-xr-x - wmpower
drwxr-xr-x - wmppp.app
drwxr-xr-x - wmsm.app
drwxr-xr-x - wmsmixer
drwxr-xr-x - wmstickynotes
drwxr-xr-x - wmsupermon
drwxr-xr-x - wmtime
drwxr-xr-x - wmtv
drwxr-xr-x - wmtz
drwxr-xr-x - wmweather+
drwxr-xr-x - wmwifi
drwxr-xr-x - wmwlmon