Some values show up as null() instead of null

[knyghtryda]

Needed to edit a couple values in the theme.dart file because they were saved as null() instead of null.

[ferchinas]

Same here:

Compiler message: lib/theme.dart:406:23: Error: The method 'call' isn't defined for the class 'Null'. Try correcting the name to the name of an existing method, or defining a method named 'call'. thumbShape: null(), ^ lib/theme.dart:409:32: Error: The method 'call' isn't defined for the class 'Null'. Try correcting the name to the name of an existing method, or defining a method named 'call'. valueIndicatorShape: null(),

[jonny7737]

Issue still exists - 2020/02/09