Revert "[buttonMarkup] Accept more than just true/false for corners: tl, tr, bl, br, top, left, right, bottom as well"
Revert "[buttonMarkup] Accept more than just true/false for corners: tl, tr, bl, br, top, left, right, bottom as well"

This reverts commit be1e8721fe1605b980db52e231968b719d3992eb.

startxfr/jquery-mobile,arschmitz/uglymongrel-jquery-mobile,hinaloe/jqm-demo-ja,arschmitz/uglymongrel-jquery-mobile,hinaloe/jqm-demo-ja,arschmitz/jquery-mobile,hinaloe/jqm-demo-ja,arschmitz/jquery-mobile,startxfr/jquery-mobile,startxfr/jquery-mobile,arschmitz/uglymongrel-jquery-mobile,arschmitz/jquery-mobile