v2.1.4

Changes:

• Use keypress event instead of keydown #847 by @okoriko
• Display selected zero value (#801) (#851) by @detinho
• Remove useless console warn (#863) by @karakum
• Fix mismatched z-index values in prod code. Fixes #850
• Multiselect is crashing when using groups and $isDisabled #870 by @akki-jat
• Fix mistake in docs #872 by @ilyario
• Correct misspelling of "preferred" in component & mixin #904 by @ezracelli
• Make documentation sidebar readable in smaller resolutions (#885) by @gabrielchiconi
• remove duplicate css rules for disabled state (#913) by @Nfinished
• Fix typo in slots documentation (#895) by @btoo
• Change active input style from width auto to 100% to fix placeholder issue. (#935) by @NewkirkS
• consider $isDisabled before removing selected (#929) by @tarun1793