Suggestion

That would be great to simply save a search, giving it an icon and name.
Than in bookmarks there would be "searches" - a list with icons and names.
When click on one of them - just paste selected search to text bar.

If saving searches would also allow to save them to server (for /op) and displayed both: from server and client - that would be awesome.

I've seen several suggestions about groups and etc here.
But they are complex to implement and hard to mantain.

Saving searches on the other hand could solve much of same problems with little effort.

With it we could simply do:

• Add tags like '#decoratives' or '#machines' or even '#popular' with data packs - anyone could do his own datapack the way he wants this groups to be. Even several datapacks with different tags are possible.
• And then just save a search like '@create -#decoratives' or '@create #popular' or '@create #machines'- with icon = 'Cogwheel' and name = 'Create' would solve most use cases.

What effort needed to implement this?

• Add a tab and list with icons & names to bookmarks
• Add serialization of this new bookmarks to local file
• Add serialization of this new bookmarks to server file and implement sending this to clients
• And a very simple action to save edit box to this list and restoring it back

Compared to other proposals here it seems much easier.

Existance of all many other proposals shows that this feature is really-really needed.
So I suggest at least implementing it in this very simple scenario.