#1611 add lock icons for internal/external comments in related comments tab and check internal comments checkbox by default.

#1611 Make comments in HelpDesk module internal by default and add a visual cue to already created comments to know which is internal and which is not

#1493 fixes bug that deletes multipicklist fields when included in mass edit. Fixes bugs in automatic inclussion of fields for mass edit (checking the checkbox next to the field), as reference fields and multipicklists were not working.

fix for #1493. Avoids deleting checkbox and reference fields in mass edit. Since checkboxes and reference fields have hidden inputs in edit view, those were inadvertenly added in the mass save request.