Color of description should not change the color of event time. This
commit uses the independent setting color.eventTime instead. This
defaults to "white" and is consistent with the current behaviour when
a value for colors.description is not set.
Fixes#638
Have all instances take a function
Update the remaining modules to take this into account
Numerous smaller refactors to make some widgets work more or less the same
* Some assignments simplified by using assignment operators
* Rewrite switch statement with only one case as if.
* Rewrite if-else chain as a switch statement.
* go fmt `modules/todoist/project.go` file.
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
