Fix storing 'safe' flag on a message. The key for session value should include
folder name. A message with the same UID may exist in another folder.
Fix "rcmail is undefined" error in HTML attachment preview - regression
from commit d30460ad2fc0f78ce44d474fa2c466d660596d27, small improvements
Fix javascript error when window name (for window.open()) in IE8 contains a dot

Conflicts:

	program/js/app.js
Fix wrapping of text lines with the same length as specified length limit
Fix so forward as attachment works if additional attachment is added by message_compose hook (#1489000)
Prevent from re-adding the same forward attachment on compose page refresh

Conflicts:

	CHANGELOG
Make mime.types common locations list OS-aware
Workaround for some versions/systems where finfo_open() with second
argument doesn't do the same as with no 2nd argument as it should
Consider alternative table names from config when running DB updates
Fix handling of some conditional comment tags in HTML message (#1489004)

Conflicts:

	CHANGELOG
Added two tests for HTML comments handling in rcube_washtml class
Apply various IPAX fixes and add cleanup.sh script
Add IPAX configuration files
Temporary CSS fix