Kdenlive 25.12.3 released

The last maintenance release of the 25.12 series is out with the usual batch of stability fixes and workflow improvements. Highlights include small interface refinements such as better dock widget behavior, improved shortcut handling in fullscreen mode, logically grouped marker menu items, and a new option to disable timeline effects in the hamburger menu. The release also brings improvements to multistream clip handling and ripple editing, as well as fixing small memleak in the render widget and a crash in the curve editor. See the changelog below for more details.