NumericUpDown add InnerLeftContent and InnerRightContent

[workgroupengineering]

Allow customizing NumericUpDown like TextBox does without recreating its template.

[workgroupengineering]

@timunie please give me if i can make PR.

[workgroupengineering]

Thanks for the quick answer. I knew the possibility of using the Selector, but in my case it was not very usable. In the same view I have multiple NumericUpDown with different InnerLeftContents. I solved it by subcalsing NumericUpDown. But I think it is more useful for tuutic to have it by default. Ping me if you decide this would be a useful modification.

[rabbitism]

Actually you can use attached property as work around

[workgroupengineering]

Thanks, I hadn't thought of that

[timunie]

@workgroupengineering we have mixed feelings here. If you still think it's worth the effort, you can go ahead with a PR.

[workgroupengineering]

I'll do it next week.