fix major bugs in Find and Search in Project functionality.

fix case sensitive and regexp search, remove duplicating code

Signed-off-by: Andrey Skvortsov <andrej.skvortzov@gmail.com>

<?xml version='1.0' encoding='utf-8'?>
<BeremizRoot URI_location="LOCAL://">
  <TargetType/>
  <Libraries Enable_SVGUI_Library="false"/>
</BeremizRoot>