Ingo Weinhold a0848a1916 BButton: Add optional pop-up marker
* Add behavior constant B_POP_UP_BEHAVIOR which adds a pop-up marker
  to the button (similar to that of BMenuField).
* Add methods [Set]PopUpMessage(). To set/get the the message that is
  sent to the button's target when the pop-up marker is clicked.
2013-12-30 04:42:52 +01:00
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2013-12-30 04:42:52 +01:00
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