Fixes #1270 sequrity question

Fixes error text for sequrity question not wrapping.
fix: Warning time error, refs #1283

* warnings.php
  * expires_period was accessed as numeric value, but is a string
* inc/datahandlers/warnings.php
  * improved handling of expiry for custom warning reasons
* inc/languages/english/datahandler_warnings.lang.php
  * added error message for invalid expires_period
Fixes #1286 SQL error while Upgrade
Merge pull request #1287 from JN-Jones/fix-1286

Fixes #1286 SQL error while Upgrade
Fix #1235 Editor post icons

Removed hard coded break after 10 icons.
Added class to label surrounding icons and radiobuttons to keep them
together.
Fix #1235 Editor post icons addition

Missed some things.
Removed variable not needed anymore.
Added correct template version.
Merge pull request #1290 from sthag/feature

Fix #1235 Editor post icons
Merge pull request #1285 from Nik101010/fix-1283-feature

fix: Warning time error (#1283)
Merge pull request #1280 from avril-gh/Fixes-#1270-sequrity-question-error-not-wrapping

Fixes #1270 sequrity question
Merge branch 'feature' into templaterender

Conflicts:
	inc/functions.php