Outline Styling Missing for Date Picker

[MarkLFT]

Current behavior

When using the Material Design styling, it is not possible to select Outline style for a DatePicker. Making the date picker look very odd when all other controls have the Outline option.

Expected behavior

Date picker can display in the same way a Text control displays.

How to reproduce it (as minimally and precisely as possible)

Create a new project selecting Material design.
Add a Datepicker to the page.
Try to style it using the Outline style.

Environment

Nuget Package:

Package Version(s):

Affected platform(s):

• iOS
• Android
• WebAssembly
• UWP
• MacOS

Anything else we need to know?

[Asfiroth]

I've made a PR that addresses this: #1361 , but as stated it needs further review.