cubicweb-squareui #7412651 [basetemplates] fix meta viewport syntax definition [validation pending]

[basetemplates] fix meta viewport syntax definition

separator should be ",", not ";"

prioritynormal
typebug
done in1.0.2
load1.000
load left0.000
closed by#6ade21e42f94 [basetemplates] fix meta viewport syntax definition (closes #7412651)
patch[basetemplates] fix meta viewport syntax definition (closes #7412651) [applied]