[stable17] Fix fetching additional search results on scrolling down

[backportbot-nextcloud]

backport of #15557
cc @rbuehlma @noelmartinon

[skjnldsv]

@rullzer Handlebar have issues because the script uses npm i handlebar -g which install the latest, but our package requires the same as what is in the node_modules I think.

We should put the script in the package.json so we can use the same installed version :)

"message": "Error: Template was precompiled with a newer version of Handlebars
than the current runtime. Please update your runtime to a newer version
(>= 4.3.0).\nat core/js/dist/main.js:299:0"

[juliushaertl]

Rebased to include #17348

[rullzer]

/compile amend /

[skjnldsv]

One more issue with the infamouse npm i / npm ci :(

[rullzer]

/compile amend /