[Bug] Deleting text disables recommendations

[delvh]

• Gitea version (or commit ref): 1.15.0+dev-274-g143071ee4 and every single one below
• Can you reproduce the bug at https://try.gitea.io: Yes

Description

When a user enters text that requests recommendations (either the emoji :, the user mentioning @ or maybe later on the issue linking # syntax), recommendations will not get updated after text has been deleted from the input (i.e. removing the e from :smile ). This means the recommendations popup will be frozen in place, not changing for any input.
There are currently two ways to force the menu to close:
A) The textarea loses focus
B) Every part of the recommendation requesting input gets deleted (i.e. even the : of :smile)

It would be nice if the recommendations would also get updated when text is deleted and afterwards.

Screenshots

In this screenshot, I entered :smile, then replaced it with :build. As you can see, the menu did not get updated and is now frozen.

[wxiaoguang]

Resolved by #23985 ?

[delvh]

Yup.
Finally. I had a feeling when reviewing that PR that I missed an issue that is fixed by it 😃