Minor design tweaks to Hello World tutorial - #2

Minor design tweaks to Hello World tutorial#2

Niels Laute (niels9001) wants to merge 9 commits into

MicrosoftDocs:winui-3/tutorials/winui-notesMicrosoftDocs/windows-topic-specific-samples:winui-3/tutorials/winui-notesfrom

niels9001:winui-3/tutorials/winui-notesniels9001/windows-topic-specific-samples:winui-3/tutorials/winui-notesCopy head branch name to clipboard