Autocomplete loadout hashtags in loadout drawer

[robojumper]

Pulled out of #8916. The textcomplete package doesn't support <input /> out of the box, but the code basically works fine even when the types don't say it, so a cast makes it work.

[robojumper]

So textcomplete's TextareaEditor is written for a <textarea /> but it seems (Edge, Firefox) to also work fine with an <input type="text" />, so lying about the types works. The code is spread across three different packages in three different repos, so upstreaming <input /> support is not that simple. Not sure what the best approach is -- we could also just copy a bunch of code into DIM but it'd basically need no changes other than type signature adjustments.

Would be good to test this in other browsers though.

[bhollis]

Hmm - we used to use this for autocomplete in the main search bar, which was a regular text input. But maybe that was a previous version of the library.

[bhollis]

Sub to yuku/textcomplete#355

[bhollis]

Very cool