Backport: email cloaking does not work with & in text to 2.5.x

[zero-24]

Please see the orginal issue for 3.x (#4263) and the PR against staging (#4273)

The same issue is in 2.5.x and the same fix work good for me.

As the code is by @heleneross i mark my test as the first successful test. The PR against staging was by @n9iels Thank you guys.

[n9iels]

@test works fine for me and solves the bug

[zero-24]

thanks @n9iels i moving this to RTC as the code comes from @heleneross

This comment was created with the J!Tracker Application at http://issues.joomla.org/.

[infograf768]

@zero-24
I had to correct code style for 3.x
Can you do here too?
Space after coma: $text = htmlentities($text,ENT_QUOTES,'UTF-8',false);

[zero-24]

done @infograf768