lizhen/yuanshan: 来自研学报名，比金孔雀东西多一点 @ 3d9bb398c49aeef644d1a4b9df7da31486bdbe4d

#1475: fix Cannot read property 'apply' of null error
#1484: Change events fire twice on IE8
#1489: hide.bs.select and hidden.bs.select events not fired when "Esc" key pressed with live search enabled

#1291: don't trigger change event if selecting an option that passes the limit
#1284: check if all options are already selected/deselected before triggering changed/changed.bs.select
#1245, #1310: With livesearch, when keypress, focus to search field isn't working with some characters
#1257: fix issue with Norwegian translation
#1346: fix edge case where default values are not respected when initializing the plugin
#1338: improve support for disabled optgroups and hidden options
#1373: prevent selectAll and deselectAll from being called on standard select boxes
#1363: if hideDisabled is enabled, and all options in an optgroup are disabled, the optgroup is still visible
#1422: fix menu position inside a scrolling container
#1451: fix select with input-group-addon on both sides
#1465: changed.bs.select not firing for native mobile menu
#1459: jQuery 3 support - $.expr[':'] -> $.expr.pseudos

#950: add .selectpicker('toggle') method to allow menu to be open/closed programmatically
#1272: add showTick option
#1284: selectAll and deselectAll now trigger the changed.bs.select event

Add Lithuanian translations.

#1250: don't destroy original select when using destroy method
#1230: Optgroup label missing when first option is disabled and hideDisabled is true

Add new translations.