Check if search input should be focussed when opening
Check if search should be focused when the dropdown is activated
Also check if search input should be focussed for multiselects
.destroy() should destroy all selected select2
Prevent the cursor from setting it to initial position in IE
Merge pull request #2216 from lboynton/fix-search-focus-on-mobile

Fix search focus on mobile
Merge pull request #2236 from mkurz/destroy_fix

.destroy() should destroy all selected select2
Merge pull request #2238 from mkurz/focus-fix

Prevent the cursor from setting it to initial position in IE