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
Allows users to filter the Jenkins jobs shown in the widget by providing a regular expression in the config file. The regex should be specified in the config like so:
```
jobNameRegex: ^[a-z]+.$
```
Another example:
```
jobNameRegex^[a-z]+\[[0-9]+\]$
```
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
