"Include Article" doesn't search article content

When updating ticket in RT 5.0.0, noticed that “Include Article” field searches article titles only.

In RT 4.4.4 it searched article contents also, i.e. custom field in ObjectCustomFieldValues table.

How to fix this?

To search anywhere in the title change https://github.com/bestpractical/rt/blob/stable/share/html/Helpers/Autocomplete/Articles#L54
from:
$op => 'STARTSWITH'
to:
$op => 'LIKE'

Still need a way to search article’s LargeContent field in ObjectCustomFieldValues table.