Fix for super-wide tooltips (from jQuery UI)
Partial fix (and TODOs) for placeholder text in external file description field
Disabling jQuery UI tooltips (redundant with inline validation feedback)
Fix for height of homepage search box
Fix for misplaced carousel controls

Added this with conditional CSS block for Webkit browsers (Chrome+Safari)
Merge remote-tracking branch 'origin/jima-secondary-cleanup' into dryad-staging