Feature request name
Shift tooltip functionality and tooltip appending before modname

Feature request description
Using item.addShiftTooltip() should have an optional parameter to add shift text, indicating that holding shift will display additional info.

On a similar note, tooltips should be appended before the modname.

Feature request reason
Currently, an item has no indication that it has shift text. Maybe individual words should be recolorable, to emulate how mods like Thermal Expansion display a yellow italic "Shift".

Tooltips appended before the mod name would be consistent with all other items with a native tooltip.

Feature request dependencies
Shouldn't have any dependencies.

With the way tooltips work, it isn't that easy to add stuff before the mod name unless it is your own item