Predefined area selection doesn't work properly

[MarioLocati]

The plugin does not correctly set the geographical coordinates associated to each predefined geographical area as set in the configuraion file at https://github.com/INGV/qquake/blob/master/qquake/config/config_services_styles.json#L224

[robertovallone]

It's pretty strange - slightly unpredictable - behaviour.
The plugin shows different behaviours for different services, i.e.

• AHEAD-EPICA: the data-related bounding box is chosen
  boundingbox: [ 22 -23.5, 23 35, 24 32, 25 69 26 ]
  instead of the service-related one
  "boundingboxpredefined": "Europe",
  If the user chooses another predefined area, the plugin works as expected except for "Europe" and "World", where (again) the data-related bbox is used for the query.

• EMSC-CSEM: everything works as expected;

• ETHZ-SED: the query is possible only for data-related bbox (which coincides with service-related one), whichever predefined area the user chooses. The only exception is for Greece, where a bbox [11.0, 45.4, 11.0, 45.4] (a single coordinate) is queried, but such "bbox" is not defined anywhere...

• INGV ASMI-CPTI: again, the data-related bbox is queried per default while all the predefined areas work with wrong coordinates, different from those declared in the config_services_styles.json file.