Doc: Fix internal properties

That are visible in the documentation.

Change-Id: I714548ad499d2ceeaae671ddfd907808243f9421
Reviewed-by: Jens Bache-Wiig <jens.bache-wiig@digia.com>
Tests: Add test for activeFocusOnPress property

For
- SpinBox
- TextField
- TextArea
- ToolButton
- Button
- CheckBox
- RadioButton
- Slider

Change-Id: I36c82c5058cfc9493d9fdb8c96c6612b1f387c0f
Reviewed-by: Jens Bache-Wiig <jens.bache-wiig@digia.com>
Some fixes related to row/column Spacing

* API: set{Horizontal,Vertical}Spacing -> set{Column,Row}Spacing
* Fixed a bug where setRowSpacing actually modified the column spacing.
* The ctor now set the spacings of both row and column in one go.

Change-Id: Ic5c5921f6f4e38edaeafdf911a2f14fbc7d496f8
Reviewed-by: Jens Bache-Wiig <jens.bache-wiig@digia.com>
Change the default horizontal alignment from center to left aligned

Only the vertical alignment will be centered. (This should probably
change to baseline once we support that).

Change-Id: I1993821ff2d63f4bcc9408b54d20c9b353693df3
Reviewed-by: Jens Bache-Wiig <jens.bache-wiig@digia.com>
Merge branch 'stable' of git://qt.gitorious.org/qt/qtquickcontrols into HEAD