Numeric up down support

[tznind]

• Know and offer the correct T types that are known supported
• All relevant properties designable
  • Value
  • Increment
  • Format*
• No 'Heya' and no show Text
• Tests

* De-scope for now

Bugs

• Click and drag support (currently seems problematic)

Probably stems from the subviews, its similar problem to ColorPicker hsv in that you can only click and drag in 'empty space' in the View. Probably there is some solution involving using the ignoring property in TGD HitTest. We might be able to have a delegate or a global collection of these 'subviews' (basically anything that doesn't have a .Data of Design.

public static View? HitTest(this View w, MouseEvent m, out bool isBorder, out bool isLowerRight, params View[] ignoring)

• Cannot set Value on decimal T

Failed to set Property
Object of type 'System.String' cannot be converted to type 'System.Decimal'.

   at System.RuntimeType.CheckValue(Object& value, Binder binder, CultureInf
o culture, BindingFlags invokeAttr)
   at System.Reflection.RuntimePropertyInfo.SetValue(Object obj, Object valu
e, Object[] index)
   at TerminalGuiDesigner.ToCode.Property.SetValue(Object value) in D:\Repos
\TerminalGuiDesigner\src\ToCode\Property.cs:line 124
   at TerminalGuiDesigner.Operations.SetPropertyOperation.DoImpl() in D:\Rep
os\TerminalGuiDesigner\src\Operations\SetPropertyOperation.cs:line 172
   at TerminalGuiDesigner.Operations.Operation.Do() in D:\Repos\TerminalGuiD
esigner\src\Operations\Operation.cs:line 48
   at TerminalGuiDesigner.Operations.OperationManager.Do(IOperation op) in D
:\Repos\TerminalGuiDesigner\src\Operations\OperationManager.cs:line 46
   at TerminalGuiDesigner.UI.Windows.EditDialog.SetPropertyToNewValue(Design
 design, Property p, Object oldValue) in D:\Repos\TerminalGuiDesigner\src\UI
\Windows\EditDialog.cs:line 93
   at TerminalGuiDesigner.UI.Windows.EditDialog.SetProperty(Boolean setNull)
 in D:\Repos\TerminalGuiDesigner\src\UI\Windows\EditDialog.cs:line 119

[BDisp]

LGTM. Nice work.