fix bug 909529 - improve attachment error message
fix bug 926616 - Move overflow prevention to only place it's used, zone
fix bug 926896 - Prevent header misalignment in the wiki
fix bug 926858 - Remove 'last reviewed' text from wiki pages
Make the WYSIWYG toolbar scroll with the editor in all cases
fix bug 917263 - Change up arrow to right arrow in togglers
Update docs to append to, not replace, /etc/hosts

The previous command (sudo tee /etc/hosts) completely replaces /etc/hosts with
standard input. The -a option (sudo tee -a /etc/hosts) ensures standard input is
only appended to /etc/hosts.
Fix bug 879978: Add New Relic to MDN.
Merge pull request #1517 from ubernostrum/new-relic-879978

Fix bug 879978: Add New Relic to MDN.
fix bug 925056 - Make TOC scroll with the user
Merge pull request #1508 from darkwing/scrolling-toc-925056

fix bug 925056 - Make TOC scroll with the user
Merge pull request #1509 from darkwing/double-scrollbars-926616

fix bug 926616 - Move overflow prevention to only place it's used, zone
Merge pull request #1510 from darkwing/heading-margin-926896

fix bug 926896 - Prevent header misalignment in the wiki
Merge pull request #1511 from darkwing/remove-reviewed-926858

fix bug 926858 - Remove 'last reviewed' text from wiki pages
Merge pull request #1512 from darkwing/scrolling-WYSIWYG

Make the WYSIWYG toolbar scroll with the editor in all cases
Merge pull request #1514 from darkwing/folder-arrows-917263

fix bug 917263 - Change up arrow to right arrow in togglers
Merge pull request #1515 from openjck/append-etc-hosts

Update docs to append to, not replace, /etc/hosts
Merge pull request #1502 from nhenezi/descriptive-attachment-messages

Bug 909529 - improve upload attachment error message