Datepicker: Remove unnecessary mouseover trigger

Fixes #5816
Closes gh-974
Tooltip demo: Reword dialog description for clarity

Closes gh-1233
Selectmenu: Add new production selection demo

Closes gh-1230
Tooltip: Don't use `rgba()` for solid colors in video player demo

Fixes a display issue in IE8.
Menu: Use item.outerHeight() in _scrollIntoView

Fixes #9991
Build: Generate pre-releases the same way as stable releases

Fixes #9998
All: Fix typos

Closes gh-1237
CONTRIBUTING: Fix typo
Build: Replace @VERSION in release tags

Fixes #10006
Closes gh-1239
Build: Validate number of generated manifests

Closes gh-1241