Bug Fixes
- #2263: Selecting non-existent option throws error in v1.13.10
- #2266: Desired width of dropdown menu breaks after resizing window
- #2285: bootstrap-select throws javascript error with jquery slim
- #2289: Multiple ticks in optgroup with data-max-options defined as "1"
- #2326: In IE11, options aren't visible when moving to bottom via "up" arrow key if select has an optgroup