fix(ecau): drop images without jQuery

[ROpdebee]

So apparently my previous experimentation didn't go far enough and it turns out we don't actually need jQuery to get MB to handle the drop event. The reason we were using jQuery was that we can't "officially" instantiate our own DropEvents with a FileList with our own files in the dataTransfer property (either because of read-only properties, private constructors, or some other security precaution). However, I never tried just defining the necessary properties using Object.defineProperty, which can circumvent the readonly status. Turns out, that just works. 🎉

Fixes #440.

Tested successfully on:

• Firefox/Violentmonkey
• Firefox/Violentmonkey BETA
• Firefox/Tampermonkey
• Firefox/Greasemonkey 4
• Chromium/Violentmonkey
• Chromium/Violentmonkey BETA
• Chromium/Tampermonkey
• Waterfox/Greasemonkey 3

[codecov]

Codecov Report

Merging #472 (792e4b9) into main (e3d776f) will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##              main      #472   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           46        46           
  Lines         1008      1009    +1     
  Branches       168       168           
=========================================
+ Hits          1008      1009    +1     

Impacted Files	Coverage Δ
src/mb_enhanced_cover_art_uploads/form.ts	100.00% <100.00%> (ø)

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[ROpdebee]

/deploy-preview please.

[github-actions]

This PR changes 1 built userscript(s):

• mb_enhanced_cover_art_uploads (install preview, changes: 05817a9)

See all changes

[ROpdebee]

/deploy-preview with Greasemonkey fixes

Tested successfully with all major browser/userscript engine combinations 🎉

Greasemonkey was being naughty again though, but that's also been fixed.

[ROpdebee]

/deploy-preview because the bot doesn't listen to edited comments 🙄

[kellnerd]

🎉

P.S. When you say that you've tested with VM, that includes VM Beta, right?

[ROpdebee]

Good point, I actually only tested with VM Beta on Firefox (Chrome was the non-beta version). I have no reason to believe it won't work on VM stable in FF or VM Beta in Chrome, but I'll double-check before merging.

[kellnerd]

Well, you already did more tests than I would have done, so I definitely won't complain 😂
I just wanted to make sure that it actually fixes the problem with VM Beta (which I still haven't installed in any browser).

[ROpdebee]

I really needed to downgrade VM to the stable version anyway to verify whether #465 was because of VM beta. Can confirm this fix works on Chrome/VM beta and FF/VM stable too.

[github-actions]

🚀 Released 1 new userscript version(s):

• mb_enhanced_cover_art_uploads 2022.6.12.2 in 7fac2e8