TabX enhancement: You can now modify multiple tab labels in one operation by just appending additional <+|-|=>{lblid}:<labeldef>~~ clauses to the end. For example, to disable label 1, enable label 2, and append a new label all in one CTLOP_CHG operation:
tabdef$ = "=1:enabled=0~~"
tabdef$ += "=2:enabled=1~~"
tabdef$ += "+:label=New Label~cmd=VK_xF303~~"
