Enhancements in tooltip

[PixelT]

. When I use tab to autocomplete (e.g. method), the tooltip doesn't show (I must open the tooltip manually by press ctrl + shift + space )

var x = 'simple string';
x.sli (use tab to autocomplete) -> x.slice()

When I write all the method by no using tab/autocomplete, after open ( the tooltip automatically open...

. When I write the function arguments, it will be nice to see which argument now is active (e.g. by underline him)

function simple(a, b , c) {
    return a;
}
simple(5, <now underline 'b' in tooltip)