Improve support for other languages (UTF-8 characters) in queries

Let's get a simple object with Id and Indexed field called name. Then fill it with two lagnguage values (russian and english in my case). Now make a query like

query().order(CallTheme_.name).build().subscribe().observer ...

The result is shown in application screenshot and you can see that case insensitive collation order for english language is different that a collation order for russian, i.e. did't work for russian either.

首先使用一个包含 Id 字段和已建立索引的 name 字段的对象来复现问题，并填入俄语和英语值。运行所示的 query().order(CallTheme_.name).build() 流程，并比较不区分大小写的排序；当 collation 为两种语言都产生正确的顺序时，即表示完成。