Incorrectly mapped tags in Channel Configuration table cause Remove button to remain disabled.

[gcodetechnology]

The fix for issue #356 causes another issue. In the case where a line configuration tag has been mapped incorrectly, "Objects to table.vi" will output an error. That error feeds into "List Box Names.vi" which prevents the listbox property node from returning the ItemNames array. An empty array forces a value signal event of -1 on the listbox which disables the Remove button, thus preventing incorrectly mapped lines from being deleted.