isglobal does not support multiple variables to check (as isdef does)
Reported by Clement DAVID (@davidcl)
BUG DESCRIPTION:
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`isdef(["Model", "DOE", "Gauss", "Pol", "Sigma", "Phi", "U_m"])` is handy when checking multiple variables, `isglobal()` should support similar call.
As a workaround, one could use `and([isglobal("Model") isglobal("DOE") isglobal("Gauss") isglobal("Pol") isglobal("Sigma") isglobal("Phi") isglobal("U_m")])`
ERROR LOG:
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--> isglobal(["Model", "DOE", "Gauss", "Pol", "Sigma", "Phi", "U_m"])
isglobal: Wrong type for input argument #1: string expected.