Implement checkbox option for individual file in search result panel.
Don't show checkboxes in file-sections for the Find Result panel.
Tweaked spacing.
Adjust colspan attribute for file-section to the correct value.
Update file and header checkboxes when the last not-yet-checked item is checked.
Fix some JSLint errors.
Another try to fix the jshint error.
Fix the checkbox column width issue for file rows in search panel.
Merge pull request #8260 from adobe/rlim/file-checkbox

Implement checkbox option for individual file in search result panel.