MGASA-2017-0180 Updated thunderbird packages fix security vulnerability and bugs

Use-after-free using destroyed node when regenerating trees CVE-2017-5472. Use-after-free during docshell reloading CVE-2017-7749. Use-after-free with track elements CVE-2017-7750. Use-after-free with content viewer listeners CVE-2017-7751. Use-after-free with IME input CVE-2017-7752. Out-of-boun...