Adjust code sample layout and minimum height

[Zakariathr22]

Description

Added MinHeight to CodePresenter for better visibility. Reduced bottom margin of XamlPresenter in ColorPage to tighten spacing below code samples.

Motivation and Context

How Has This Been Tested?

Manually tested

Screenshots (if appropriate):

Before

After

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

[niels9001]

Verified that it works! Thanks!

[niels9001]

/azp run

[niels9001]

/azp run

[Jay-o-Way]

@ghost1372 (just so you know) This PR is related to the changes in #1540 where Grid Rows and the Header were removed from SampleCodePresenter; presumably because it was thought that Visual State "InlineSample" wasn't used??

[niels9001]

@Zakariathr22 and @niels9001 you both missed the fact that the Wrap (still) doesn't seem to be working

Text is wrapping just fine..

[Jay-o-Way]

Oh sorry, then the screenshot must have been made after the height adjustment and before the Wrap property was added 🤐

[Zakariathr22]

Oh sorry, then the screenshot must have been made after the height adjustment and before the Wrap property was added 🤐

Yeah 😆, I noticed the text wrapping issue just after I opened this PR so I pushed this commit to fix it rapidly.