Fixed the logscale in the AreaSource demo [skip CI]
Fixed the logscale in the AreaSource demo [skip CI]


Former-commit-id: c85b7ff25db79737617a25c20de350c267813138 [formerly 3e7989d4542c20f97502f1cc0c3427eeaa3c5731] [formerly 3e7989d4542c20f97502f1cc0c3427eeaa3c5731 [formerly 5581e4507d7b7e37ad38af67a52623c0c94c7943]]
Former-commit-id: 0445b311f0c8e28f5d2cde2df9410737cc57578d
Former-commit-id: b365b6ab59239073d01362c8b3af61b5bcb7f557
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine