Do not call InternalSetText when text is changed by pressing keys.
String format is then applied when leaving NUD or pressin +/- or with mouse wheel change.
Add HideUpDownButtons to NumericUpDown
Add DataGridNumericUpDownColumn
Add DataGridNumericUpDownColumn to .NET40 Project
Fixes #1183
* If TrackMouseWheelWhenMouseOver is true then the scollbar handles the MouseWheel event
* If InterceptMouseWheel is true then the scrollbar handes the MouseWheel event only if it has the focus
VerticalScrollBarVisibility and HorizontalScrollBarVisibility is now Auto
Find ScrollViewer in TextBox Template
Removed unused using and empty line
Hide Buttons, then buttons should be completely gone
Add Minimum, Maximum, Interval, StringFormat property to NUD-DataGridColumn
remarks: no Dependency Property
Add InterceptManualEnter DP.
If NUD is ReadOnly then InterceptArrowKeys, InterceptMouseWheel and InterceptManualEnter is set to false
If NUD is ReadOnly then HideUpDownButtons is set to true
Add HideUpDownButtons to DG-NUD-C (DataGridNumericUpDownColumn
Add DC-NUD-C to DataGridExamples and bind to Price
Fix Problems with .NET40
Change category attribute
Revert "If NUD is ReadOnly then HideUpDownButtons is set to true"

This reverts commit bb311c6c7b21ae9f207bc8991be08b755742153b.
Merge pull request #1213 from xxMUROxx/hotfix/NumericUpDown

[WIP] Hotfix/numeric up down