Slicer4

STYLE: BuildSystem: Improve comments associated with launcher settings

ENH: Added standard undo/redo shortcut to segment editor

BUG: Fixed ScreenCapture ffmpeg download ffmpeg download site added a user agent check which prevented download with default settings. Solution was to specify a user agent. Also added the option of specifying multiple mirror sites.

STYLE: BuildSystem: Update SimpleITK external proj to use recommended opts (2) Suggested-by: Bradley Lowekamp

STYLE: BuildSystem: Update SimpleITK external proj to use recommended options

STYLE: Buildsystem: Document variable Slicer_EXTENSION_SOURCE_DIRS

ENH: Buildsystem: Support packaging of existing extension install dirs Configuring Slicer using cmake -DSlicer_EXTENSION_INSTALL_DIRS:STRING=/path/to/ext1-install-tree;/path/to/ext2-install-tree ... will ensure the file found in each extension install directories are packaged with Slicer. Co-authored-by: Hina Shah

ENH: BuildSystem: Allow access to Slicer OS/Arch/bit vars in external project

STYLE: MIDASAPIUploadExtension: Fix typo

ENH: Made segmentations model export more robust In case there were errors in the subject hierarchy (SH), Segmentations module failed to export segments. Segmentations module is more robust now, if there are SH errors then it will just not place exported nodes in the same SH branch as the segmentation.