• [code quality] Use = null! to replace the [AllowNull] attribute #1987
• [enhancement][LyricMaker] Re-design the caret algorithm for the create/remove time-tag mode. #1973
• [LyricMaker] Should be able to click the error info to show all the invalid rows. #1971
• [bug][LyricMaker] Fix caret position not moving to the right position in the lyric editor. #1970
• [code quality] Global search Assert.IsNull(expected); to fix some weird check in the test case . #1657