bug/grid_input_blinking_cursor

added fix for focused input blinking cursor in jqgrid on ie

https://www.pivotaltracker.com/s/projects/896548/stories/56860706

### Root Cause
1. The input field on hiding does not loses focus which leaves the cursor:text blinking on ie

### Resolution
fix by focusing out the hidden input field in different scenarios

### Testing
manual testing

__General Requirements__
- [ ] Pull Request contains full description of changes
- [ ] Link to the Pivotal Tracker story
- [ ] Pivotal Tracker story has a reference to this Pull Request
- [ ] Rebased against latest master branch
- [ ] All comments from code review have been addressed
- [ ] There are no `-1` code reviews (can only be overridden by Kyle)

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__Coding Standards__
- [ ] Style guidelines are followed, code has been formatted
- [ ] Code follows idiomatic language paradigms

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__Testing__
- [ ] Test coverage has not decreased
- [ ] There is no performance degradation
- [ ] All appropriate automated tests are present
- [ ] Appropriate seed data exists

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__Defect__
- [ ] Feature or defect resolution has been manually tested and meets all requirements of the underlying story
- [ ] Seed data sufficient to satisfy testing resolution of defect
- [ ] Root cause analysis provided

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