[bug] Global look and feel hides MIDI learn table header

[d.healey]

Having a global LAF object present causes the header of the MIDI learn floating tile to vanish.

HiseSnippet 763.3ocsUssaZCDDcWBNpP5sH0O.+HQJMxjldQJpsIgKQnlKnRZTeKZY8BdEq20xdcRPUUpeL8CruzmoyZavlFDMAoxCHOmYl0mclyLtanhxhhTgHbkKFGvP3Ga0arT60vivknNMQ3mZcJIRyBsSgNZb.IJh4hv30N1.fqTFk76We7HhfHorbHD5REmxNg6y04ncO3SbgnMwkcA2uPz6cPGpR1PITw.eVyxAEPniHCYmQLgUxBgWukKWqB6oIZVDDyQJ2w87T2HSi+RdDuufYLpi5AGTJLpgGW31c5cMBgvk6leyWK8l+BqS4t7Y34Ufmm3vNOih0.bokQo5O.JgKPoxoTZSqdzPdfN2igOaX0QBMjADnTWjJowhv+1pgBBPp2wmLh0NDLlkPs233rsM72V6WsJTsiz1Bx.62a2RNjKY6PCYv83XgpOQjddmnTiNT51lwD01Z+AwRplqj1J4YJM6bYssp9spUp98p1+sqACVnOC2BUBAKbgtMRhvkkXMYreeV311WSDwrYAB0r4aDqe+ZDzzRUg.UxNRt97.Vlcakv0TfMOe21FJqVCO8kNMIZhoSlgAwEvB0bCcvMYWCiBo80JVMYQizpfjX8CTRyIf2PmIDSq7sEJhlKGdAGnMGXvyrJBUGcawIsw4Fe3fa3tZOD1B6TBg7X7gdZi0Owy3aJQRk1mvHgxtDISf5Ob57Wk0mdxbMyOGcxjI+XdzcKBqY2puavn6psgWsxMVPzyOpY1oj4.Z6youMhXYDWOt3NmGv7myRm+tuTbSqtbM0awbrzB3HHH9evwrsVOwp0fALpNmfksZ+0UcE0+30+YUrQ8cJQGxAwm0Yw98fNMkAucIHehLhrRlghTaGisoBziIcSL.AwjLm0M13Lm0m5D4SngpqnoC6l8hOJAA3jL4y.UfuGA110QIK.f7rb1wA4C53qnTy0+kvb5hyY2UHmWsB4r2JjyqWgbdyJjyaWgbd2RywrB4vXsxOcb..51JYSHF2RR.kUhJD8G.su3QfA

[d.healey]

Two custom LAF functions can be used to manually redraw it.

    laf.registerFunction("drawTableHeaderBackground", function(g, obj)
    {
	g.fillAll(Colours.black);
    });
	
    laf.registerFunction("drawTableHeaderColumn", function(g, obj)
    {
	var a = obj.area;
		
	g.setColour(Colours.white);
	g.drawAlignedText(obj.text, a, "centred");
    });