Fix hint-related bug.
Fix ie11 detection. Fixes #557.
Fix bad links in header comments. #398
Use better technique for keeping input focus. #351.
Fix typo. Closes #576.
Update dropdown when menu is opened through up or down key.
Make default dup detector aware of the `valueKey`. Fixes #553.
Fix errant RTL horizontal scrollbar. Closes #573.
Ensure `minLength` is a number.
Fail silently if highlight pattern is empty. Fixes #369.