initial version
Squashed 'src/libs/sticky-list-headers/' content from commit 355d2ec

git-subtree-dir: src/libs/sticky-list-headers
git-subtree-split: 355d2ecacbad014c5f0916422dd567933cc703df
Merge commit '33f34565cd6ea5d655746cdb49d1b71f66952a8e' as 'src/libs/sticky-list-headers'
added stick list headers library