desktop: Fix non-existent enum value for horizontalAlignment
Spotted thanks to syntax highlighter which has all the stdlib enum names hardcoded to be colored differently. And let's pray for better compile-time tooling for QML, because this method is not sustainable.
Set WrapMode on all TextArea components, and fix up some of the Labels
Upstream styles do not provide any wrapping by default, and thus we should not rely on deceptively convenient override in qqc2-desktop-style.