BaseVisibilityActionView was decorated with @spina, which isn't

technically allowed.
@spina should only be applied to classes that can be instantiated. For

abstract classes, we either want to use the parent class's Spina

information or use spinaBaseClassExtends to define a new top-level

class.
It seems that, by and large, decorators can't be used with abstract

classes. When compiling, we get basically:

const foo = abstract class Foo {}


This is a syntax error in JavaScript.
The reason we didn't encounter this problem before is that Babel was

stripping out the abstract when it processed the TypeScript and

compiled to JavaScript. The TypeScript compiler leaves it in, in order

to try to wrap it in a decorator.
Going forward, we'll need to be careful not to decorate these classes.

Unit tests pass.
Verified that this no longer broke the build when compiled via

ESBuild and Storybook.