Implement DIALOG_ROBOT and DIALOG_STICKY

[gbsierra]

Implemented DIALOG_ROBOT and DIALOG_STICKY

For UiRobot -
consider adding a limit to equipped items and disabling for other robot types if needed

[rollerozxa]

choosing equipment makes it disappear instead of equip.
equipment needs 'none' logic
equipment displays builder/arm cannon by default although it is not in corresponding item array

There seems to be a mismatch between the IDs of equipment. There are two equipment IDs, one for the item representation which is unique across all equipment and items, and one specific to the equipment type. The item IDs for the arm cannon and builder is 0 and 1 respectively, so sounds like it tries to apply a bunch of random non-equipment items that have low IDs (which obviously won't render anything)