Table: remove reflow CSS hack for Safari <= 5

It causes problems with assistive technology not being able to detect tables.

This effectively reverts bafa5d95d1ae2f028749c710aa198b96de7eeb3d, thus
removing the fix for gh-5380.

Closes gh-6584
Fixes gh-6583
Re gh-5380
Build: Updated jQuery core
Build: Updated version in Bower JSON file
Theme: Keep background for checkbox-off icon when using no-disc icons

Fixes gh-6993
Closes gh-7451
Theme: Added a comment for the ThemeRoller

Fixes gh-7454
Closes gh-7455
Table: prevent jqmData calls for columns without a priority.

Closes gh-7315
Fixes gh-7357
Helpers: Fixed typo in description

Closes gh-7429
Defaults: Fixed minor typo in comment

Closes gh-7427
Build: Update version from pre to -pre

Ref jquery/jquery-release#61
Closes gh-7328
Slider and Rangeslider: Express module dependency

Both modules have a hard dependency on the "vmouse" module that should
be expressed in AMD.

Re gh-5987
Closes gh-7383
Closes gh-7274
Demos: Allow text selection in INPUTs and TEXTAREAs.

Closes gh-6819
Tabs: Fixed typos on the demo page

Fixes gh-7459
Closes gh-7460
Listview: Make it possible to apply count theme with a class

Fixes gh-6966
Closes gh-7457
Theme: Prevent text underline in visited link buttons

Fixes gh-6926
Closes gh-7447
Core: Width auto for inline button elements in toolbars

Fixes gh-7232
Closes gh-7446
Checkboxradio: When pre-rendered, assume label is a sibling of the input

Closes gh-7471
Fixes gh-7470
Table: Copy entire contents of reflow headers into reflow bold tags

Closes gh-7437
Fixes gh-7415
Selectmenu: Delay trigger until after the list closes

Closes gh-7197
Fixes gh-7076
Toolbar: Back button correctly appears/disappears on external toolbar

This commit makes the following modifications:
1. Rename _addBackButton() to _updateBackButton() and move the decision making
   as to whether to add or remove a back button from _setOptions() into
   _updateBackButton().

2. Call _updateBackButton() from refresh() as well. This will cause the back
   button to be updated whenever the page changes, because the "pageshow"
   handler is hooked up to refresh().

3. Modify _addHeaderButtonClasses to not recognize the back button as a left
   button.

4. Modify the preconditions for adding a button to include an alternative to
   checking the page's URL for instances where there is no page present - i.e.
   when the toolbar is external. In such cases one must add a back button if
   the active item on the history stack is not the first item.

Closes gh-7188
Fixes gh-6950
Transitions: Correct exception in unit tests

Fixes gh-7458