Clicking resizable handle (or sub-element) does not blur active input

Tested broken in 1.10.4, 1.11.4, and 1.12.1. May go back even further.

Reduced test case: http://jsbin.com/jigofipaje/1/edit?html,css,js,output

This has already been fixed for draggable:

• https://bugs.jqueryui.com/ticket/4261
• https://bugs.jqueryui.com/ticket/12472
• https://bugs.jqueryui.com/ticket/14905

Probably should create a shared fix instead of just redoing the same hacks in resizable.

Also may be related:

• https://bugs.jqueryui.com/ticket/13578