Fix bad completion with keyword prefixes

[RblSb]

var innerText = 1;
in<tab> // innerText instead of ininnerText

Basically this should be a switch with a full KeywordKind, but i only added short keyword as most annoying while auto-completing stuff. Some macro to extract all enum fields to array can be used, but maybe this is enough.

I also wonder, do we need a simple do keyword completion? It prevents some do... fields from being autocompleted.