[stools][fix] Various fixes

Tracker issue:
http://joomlacode.org/gf/project/joomla/tracker/?action=TrackerItemEdit&tracker_item_id=32361&start=0

This pull request fixes:

* [x] Remove unused $langs in layouts.
* [x] Missing translations in menus management ordering field 
* [x] Ordering by associations should not be shown when associations are not enabled 
* [x] In banner clients you cannot filter by unpublished + monthly. it doesn't filter by status
* [x] Fix mobile device views
* [x] Filter by content languages available,, not by languages available
* [x] Pagination error for custom limit
* [x] Menu items not ordered by ordering / sortable not working

I also improved search tools with:
* Include minified versions of the search tools jQuery plugin
* Load search tools directly from an JHtml library instead of a layout
* Now search tools allows you to avoid loading core jQuery
* Now the clear button doesn't remove the ordering & limit options (I added a `clearListOptions` option to be able to enable disable it)
* I verified that moving 10 lines of code from the layout to the view column ordering works without loading the layouts. I didn't move all the code to views because it will be a lot of duplicated code but it's an option for devs now if they don't want to use search tools.
* Added the option to show/hide ordering+limit fields with a button like the "Search tools" one.