Vue-ify Upload Dialog w/small fixes

[jmchilton]

See individual commits for details.

• Removed upload-button.js - mostly unused after Porting Tools Panel to Vue.js (resolves #8262) #8368.
• Simplifications and ES6 stuff to existing upload Backbone components.
• Swap upload-view to UploadModal and use b-modal instead of Galaxy's modal stuff - use no-enforce-focus to ensure Select2 works within the modal.
• Migrate usage of upload Tabs to b-tabs - (initial shim for Backbone views in early commits replaced with Vue components for each tab type in subsequent commits).
• Replace each mvn/upload/<type>/<type>-view.js Backbone View with a Vue component.
  • Migrate composite-view.js to a new Composite.vue - eliminates Backbone view for everything but the row. Still relies of Backbone models.
  • Migrate collection-view.js to a new Collection.vue - eliminates Backbone view for everything but the row. Still relies of Backbone models.
  • Migrate rules-input-view.js to a new RulesInput.vue - eliminates Backbone view, never used row views or models.
  • Migrate default-view.js to a new Default.vue - eliminates Backbone view, eliminates Backbone view for everything but the row rending. Still relies on Backbone models.
  • More reuse than Backbone code given mixins and components - this PR vastly reduces the duplication between the collection and default uploads.
• Parameterized lazy limited widget handling between Default.vue and Collection.vue - either can have a lazy limited set via a Vue property. Really reduces the divergence between default upload and collection upload nicely. I added some tests for this and fixed an off by one error inside of lazy-limited.js.
• Largely unrelated to Vue, but I took a first crack at eliminating a lot of the copy-paste duplication between the Backbone views in default-row.js and collection-row.js. Just cleaning up past messes I made ahead of potentially Vue-ifying these as well.
• Eliminates some qunit tests, adds more modern vuejs-utils tests. Not exactly one-to-one because some jquery plugins behave different in karma vs. qunit but definitely considerably more tests now.
• Generalize special case handling of FTP files that uploads them all in a single request for default uploads to work with collection uploads also - removing divergence between two upload modalities.

[jmchilton]

Continued the vue-ification throwing in the tabs and the actual composite uploader view... select2 still not working. I think the way the tabs work - this is all now creating the select2 components later... I had hope that would fix things. (Fixed see comment below)

[jmchilton]

It was the tabindex on b-modal... select2/select2-bootstrap-theme#41

https://bootstrap-vue.js.org/docs/components/modal/ no-enforce-focus on the modal seems to fix it - but it is strongly discouraged. I guess it is no worse than our current modals?

[jmchilton]

@galaxybot test this

[guerler]

Noticed that the select2 dropdown width seems to be fixed to the actual parent dom width:

[jmchilton]

I've fixed the Select2 width issue with 224a92a I believe. Thanks for the catch @guerler

[guerler]

I think we need to vue-ify the backbone rows too, other than that this looks great.

[jmchilton]

I think we need to vue-ify the backbone rows too

Eventually that would make sense, but there is no reason that would have to happen as part of this PR I assume. I did this to enable #9110 and #9114 not to just to Vue for the sake of Vue-ing.

[dannon]

This seems fine as an incremental step. As we eliminate the rest of the backbone (especially the models..) it'll all be a lot cleaner.

Thanks!