Revert "improve word completion to use highlighting to detect word boundaries"

Authored by cullmann on Feb 1 2020, 8:19 PM.

Description

Revert "improve word completion to use highlighting to detect word boundaries"

This reverts commit 8d0f6ff8014cdf32be6410efa184a968ce53525a.

try to fix code completion behavior

this needs more investigations, I assume the string we search for has different boundaries

BUG: 412502