Minor theme-related changes to make FBSMP compatible with the latest dev of FBSS. See issue #1263952

#1276802 by publicmind: Support the decoding of characters when the charset is already present in the head meta tag.

#1261570 by publicmind: Export the available information from plugins into the theme variables while pre-processing the status item.

Issue #1228694 - Pressing enter while entering attachment information causes the page to refresh by IceCreamYou

Added a clearfix so that the "Attach" button doesn't drop down over whatever is below it when it's clicked

Modifications to commit 5f26af29, to make sure that we set error if the validation fails while submitting the URL before attaching it.

Make sure links are completely attached if a user enters a link but clicks Share without clicking Attach

Replace FBSS's "do not show empty status" Views filter with FBSMP's equivalent when FBSMP is enabled

Fixed a potential bug with fbsmp_save_status with NULL sender

Integrate with the FBSS sub-modules alerts.

Firefox doesn't support 'focusout' for jquery as of 4.0, replace it with 'blur'. It bubbles though, but who cares. (cherry-picking from commit 2ccafbfe)

#1139618: Emvideo provider Youku expects 'embed' parameter for no reason, lets just pass it and get over with. (cherry-picking from commit 8cb61b7e)

Integrate with FBSS's 'has attachment', although delete will still not work until FBSS implements it.
More advanced trigger/hooks integration.
Improved Activity2 publisher templates by removing the irrelevant form.
Fixed issue #1165878, wrong FBSS keys (Thanks tugis).
Improved Rules integration and documentaion help.