BEAUti Tip Date panel does not show Nexus configuration

[walterxie]

1. Import alignment examples/nexus/Dengue4.env.nex;
2. Check the Tip Date panel, it has nothing.

The file has a "CALIBRATION" block:

BEGIN CALIBRATION;
	OPTIONS SCALE = years;
		
	TIPCALIBRATION
		94 = 1994:D4ElSal94,
		86 = 1986:D4PRico86,
		85 = 1985:D4Tahiti85,
		84 = 1984:D4Mexico84 D4Philip84 D4Thai84,
		82 = 1982:D4Brazi82,
		83 = 1983:D4ElSal83,
		81 = 1981:D4NewCal81,
		79 = 1979:D4Tahiti79,
		78 = 1978:D4SLanka78 D4Thai78,
		77 = 1977:D4Indon77,
		76 = 1976:D4Indon76,
		64 = 1964:D4Philip64,
		63 = 1963:D4Thai63,
		56 = 1956:D4Philip56
		;
END;