Mattermost-server: Remove JQuery Dragster dependency

[esethna]

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Notes: Jira ticket

Now we use a small jquery library call jquery-dragster (placed in non_npm_dependencies directory) to handle the drag and drop events in the components/file_upload/file_upload.jsx file. We want to remove that dependency handling that events directly using vanilla javascript. This can be done migrating jquery-dragster to something in vanilla javascript and store it in the utils directory, or directly rewriting how the drag and drop events are handled in the components/file_upload/file_upload.jsx file.

[goku321]

Interested in taking this one.

[jespino]

Awesome, thanks @goku321! ✨

[hanzei]

Hey @goku321, Do you have any questions about this ticket?

[goku321]

Hi @hanzei due to workload I am not able to make progress on this one yet but this is definitely on my to-do list. I know I delayed it a lot but I need a couple of days to make some progress. If I am not able to work on this I will let you know. Thank you for your patience

[hanzei]

Thank you very much for the update @goku321 :+1:

[hanzei]

Hey @goku321,

There was a confusion from @niklabh about the Help Wanted process. He didn't knew that you claimed this ticket and opened a PR for. Sorry for this.

[goku321]

@hanzei No problem. Thanks @niklabh , this ticket was long overdue :sweat_smile: