4.0: AutoComplete registers extender attributes as extender functions

[ivan-mogilko]

Problem

Since in 4.0 the compiler supports extender attributes, the autocomplete should handle them correctly.

Example of script:

struct MyStruct
{
    int a;
};

readonly attribute int AttributeEx(this Parent);

What AutoComplete does - it registers AttributeEx as a extender function instead, meaning it displays a "extender function" icon instead of a "property" icon, and also suggests that it has a parameter list in a tooltip.

Expected

AutoComplete needs extra icon for "extender property", which combines "property" icon with a arrow, similar to how it's done for extender function icon which combines a "function" icon with a arrow.

Idk where these icons are from, if they are scintilla's, and there's no way to add a custom one, then at least it should use the "property" icon. But I suppose that the main problem is distinguishing extender attributes from extender function types when parsing for autocomplete.