Debounce webui search

[gbodeen]

The search input field on the open-vsx.org is not debounced. So, for example, if I rapidly type "123456" into the search field and add a debug log for the requests sent by the page, I see a separate query sent for each character:

There is, however, code present for debouncing the sending of new searches and aborting old requests. It's just not run at the correct time. I believe the empty useEffect dependency list (removed in this MR) was an accidental mistake. Without that empty list, the debounce behavior appears correct; the useEffect callback cancels all but the last search within the debounce period. Only the final query is sent to the server.

[vince-fugnitto]

I believe the improvement fixes #925 👍

[amvanbaren]

Thanks @gbodeen! Works as expected.

[gbodeen]

@amvanbaren
Unfortunately, we've found an error with this in a downstream project. It can cause extensions not to appear on a fresh load of the webui homepage. I'll suggest a fix in a moment.

[amvanbaren]

@gbodeen I noticed the same upon closer inspection. #932 fixes it.