categories_config.php

1. Fixes #0000201: Ability to set default width for each grid column after clean installation.

2. Done for "categories_config.php". Also removed leading "::" in design name.

INP-163

1. Fixes #0000189: Changes in Options for "Section Template" field for Sections.

2. Implemented not exactly the way as planned, because administrator can change "Parent Section" from "Content" (top category, where "Inherit from Parent" option in "Template" field not available) to it's child section, where this option should be available. As a result I always show "Inherit from Parent" option, but when administrator manually selects "Inherit from Parent" in "Template" field and "Content" in "Parent Section" field and tries to save changes, I show him an error about that.

INP-152

Bug #0000194: Minor changes Site Configs for Projects setup

1. Minor visual changes in the drop-down options for "Section Template" field on Add/Edit Section.

2. Hiding Stylesheets section completely until we figure out what to do with it.

MCUS-3

Releasing version 'branches/5.0.x' (copy from 'branches/RC')