Fix QSegmentedElement display problem

Remove UIUserInterfaceIdiom specific code and instead make the
segmented control resize it's own width and height, with an initial
frame matching the cell.contentView.

Also add the segmentedcontrol to the cell's contentView rather than to
the cell directly.

This fixes the QSegmentedControl rendering issues that are visible in the iPhone and
iPad versions of the QuickDialog example (under the Sample Controls) section.
Merge pull request #483 from bartvandendriessche/fix/qsegmentedcell_render_bug

Fix QSegmentedElement display problem
adjust width for ipad screen

When iPad show splitview,shouldn't use screen width,should use tableview width.
Fixed bug in getImageFromItem: method.

The description of the selected value is used erroneously.
Fixed default QColorPickerElement items.
Merge pull request #485 from SSheldon/master

Fix QColorPickerElement getImageFromItem: method
Fixed an issue where, if the controllerAction was not set, but onSelected was set, the selection style of the cell was wrong.
Merge pull request #488 from siancu/master

selectionStyle is wrong for QLabelElement
Check whether value is NSNull. When dynamically set property to nil, we must send [NSNull null] instead of nil which can't  be set as an NSDictionary value.
Merge pull request #489 from Igotit/master

Check whether value is NSNull.
MacBuildServer Try button
update MacBuildServer button
Fixes default alignment for entry and font for textelement
Merge pull request #494 from macbuildserver/master

MacBuildServer Install App Button
Fix and improve issue #481. Refactor handling of changed values. Add support to fire onValueChanged for controls that have user-change actions like Segmented, Boolean, Date, Multiline, Float & Decimal controls.

The onValueChanged is fired for all the above, but handleEditingChanged for some few.
Minor fixes
Merge branch 'master' of github.com:escoz/QuickDialog

* 'master' of github.com:escoz/QuickDialog:
  Fixes default alignment for entry and font for textelement
  update MacBuildServer button
  MacBuildServer Try button
  Check whether value is NSNull. When dynamically set property to nil, we must send [NSNull null] instead of nil which can't  be set as an NSDictionary value.
  Fixed an issue where, if the controllerAction was not set, but onSelected was set, the selection style of the cell was wrong.
  Fixed default QColorPickerElement items.
  Fixed bug in getImageFromItem: method.
  Fix QSegmentedElement display problem
  Fix CocoaPods build
  Forget to change it here. Sorry.
  Rev'd up podspec
  Deselect row when navigation controller pop
Minor null checking
Fixes disclosure accessory display
Small fixes for dynamic section