Windows 10 build 18323 (19h1 release)

Windows 10 build 18323 was released on 2019-01-24 to Insiders in the Fast Ring. It is the first build to be compiled in the new 19h1_release branch.

New features

 * RAW image format support has been improved
 * Various bugfixes related to the new light theme
 * The version number has been updated to 1903 as opposed to 1809 on the previous builds.
 * Other general changes, improvements, and fixes