(Bug 4750) Misleading error message when exceeding tag limit counts

Changes error message when exceeding tag limit count to: "Adding this tag
would exceed your maximum of n tags. You will not be able to add new tags
until you delete n existing tags."
(Bug 4750) Misleading error message when exceeding tag limit counts

Changes error message when exceeding tag limit count to: "Adding this tag
would exceed your maximum of n tags. You will not be able to add new tags
until you delete n existing tags."
(Bug 4176) Fix errors in notif username display

Previous commit displayed original requester's display name
in all notifs relating to a support request. It should display
username not user-set display name, and should display u/name
of person who triggered notif, instead of name of OP.
(Bug 5073) Add skiplinks to the foundation version of the site skins
(Bug 5073) Fix the nav search alignment

* adds space to the right
* remove styling from form elements, make them the same height
* remove alignmen as columns. We don't need the extra alignment /
  spacing within the header search itself
(Bug 5073) Don't show the drag and drop interface for touchscreens
(Bug 5073) Make the header space smaller on tiny screens
Merge pull request #565 from kaberett/bug4176-support-notifs-fix

(Bug 4176) Fix errors in notif username display
Merge pull request #562 from hotlevel4/bug4750/ExcessTagErrorMessage

(Bug 4750) Misleading error message when exceeding tag limit counts
(Bug 5073) Fix top bar being cut off at the right in gradation-vert
Merge pull request #566 from afuna/bug5073-misc-fixes

(Bug 5073) Tweaks to site skins (foundation version)