IDManager : finished Import/Export. Added merging capability to import (asks if particular ID is replaced during import). Added ESC as closing shortcut to IDManager dialog, and adjusted its size.

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