ESDEV-2066 Ensure that function htmlspecialchars() and htmlentities() used correct way

Changed htmlentities to oxStr::getStr()->htmlentities in genimport_main.php
ESDEV-2066 Ensure that function htmlspecialchars() and htmlentities() used correct way

Changed htmlentities to oxStr::getStr()->htmlentities in tools_list.php
ESDEV-2066 Ensure that function htmlspecialchars() and htmlentities() used correct way

Changed htmlspecialchars to getStr()->htmlspecialchars() in functions.oxscript.php
ESDEV-2066 Ensure that function htmlspecialchars() and htmlentities() used correct way

Changed htmlspecialchars to getStr()->htmlspecialchars() in functions.oxstyle.php