Merge
8138838: docs cleanup for java.desktopSummary: docs cleanup for java.desktopReviewed-by: serb
8136494: Update "@since 1.9" to "@since 9" to match java.version.specificationReviewed-by: alanb, chegar, lancea, prr
8029339: Custom MultiResolution image support on HiDPI displaysReviewed-by: flar, serb