Change wording of instructions for menu item configuration

[tw2113]

Right now, the text says "Drag each item into the order you prefer. Click an item to reveal additional configuration options." but the last part isn't accurate because the dropdown for the options is only triggered when clicking the arrow on the right. Patch adds that for clarification. "Click the arrow on the right of the item to reveal additional configuration options."

[nacin]

lessbloat, good?

[DrewAPicture]

menuconfigverbage.diff​ looks good to me.

[SergeyBiryukov]

[24183]