Rather than referencing wtc.Config, instead pass the global config
Also, look up config for the module early and pass that in sooner, to deal with fewer long paths and get rid of the
ConfigKey variable
If, on startup, a widget's positional configuration is invalid (ie:
cannot be displayed onscreen) then terminate the app and inform about
which widget is erroring
When no widget has focus, press the letter key to focus on the widget
assigned to that letter.
Example:
GitHub (d)
Press "d" to focus on the GitHub widget.
