Settings: Fix the SMS Limit setting location

We were saving a Settings.Global setting using Settings.Secure.putInt
this commit fixes it.

Change-Id: I00bb39a8798e66fb4db779bdd450bbc60657676a
Settings: Fix color picker ComposeShader view

The shader was not showing the proper combined gradients.  This is a
limitation of the ComposeShader in Android 3+ and has to do with the
hardware acceleration as described here:

'ComposeShader can only contain shaders of differenttypes (a BitmapShader
and a LinearGradient for instance, but not two instances of BitmapShader)'.
But, 'If your application is affected by any of these missing features or
limitations, you can turn off hardware acceleration for just the affected
portion of your application by calling:
    setLayerType(View.LAYER_TYPE_SOFTWARE, null).'

Change-Id: I8d945e37ed97c409a0cc7e9ec5570019545f0f68
Settings: Use proper 64x64 XHDPI icon for Security Settings

Seems AOSP had a copy/paste derp.  The XHDPI and the HDPI icons are
the same (48x48) where the XHDPI one should be larger.  I am using the
CM10 icon now.

Change-Id: I1ad2f30400d24187848fbef0ae907fd8f71edde4
Fix NPE exceptions in the Quick Settings menu

Double check that the settings were not previously removed and are
now null.

Change-Id: I3971f818ebbb5630caf348e38bfe1b2721f8ff48
QuickSettings : Filter tiles from default

Filter unsupported tiles from default.
Fixes re-arrange issue found on tablets post reset

Note : Please reset quicksettings after this commit to fix issues.

Change-Id: Ib92a8fc7e5e23baefb1e83a0309e73879ca64515