Uno: Implement TextBox on macOS

[MartinZikmund]

What would you like to be added:

TextBox on macOS

Why is this needed:

⌨

For which Platform:

• [ ] iOS
• [ ] Android
• [ ] WebAssembly
• [ ] WebAssembly renderers for Xamarin.Forms
• [x] macOS
• [ ] Windows
• [ ] Build tasks
• [ ] Solution Templates

[MartinZikmund]

In progress

[MartinZikmund]

Had to leave this one for a while, required additional fixes in other places. Now in better shape, finally able to display and accept input as well as play nicely with theming. But a quite a few things are still missing, so will take a bit more work

[jeromelaban]

@MartinZikmund make sure to sync up with @ajpinedam, he's also looking at this.

[ajpinedam]

@MartinZikmund I have made a good advance on this one. Tell me when we could sync if you want. Any input would be appreciated.

[MartinZikmund]

@ajpinedam oh, I didn't know that. I'm currently in Japan, will return on 14th March, so let's plan some call regarding this, will ping you on Twitter

[MatFillion]

@ajpinedam @jeromelaban this should be closed? We have it working in the gallery so I assume it's done =D

[MartinZikmund]

Closing it :-)