Name Vue component classes

[eddybrando]

Currently we use anonymous classes for Vue components, like this:

// components/ui/InfiniteScroll.vue
export default class extends Mixins(ScrollSectionsMixin) { }

Naming component classes can help with DX by making them easier to distinguish with Vue.js devtools.

This

// components/ui/InfiniteScroll.vue
export default class InfiniteScroll extends Mixins(ScrollSectionsMixin) { }

would result in this:

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Originally raised in #1099 (comment)