changes to make sure that the results are the same after refactoring (order of elements in returned structure)

debian scripts use either default db properties (from persist/main/src/resource/db.properties file) or user defined db properties (/etc/minerva/db.properties)

Resolve "Error when exporting ReconMap to SBML"

Closes #395

See merge request piotr.gawron/minerva!293

Resolve "uploading of images"

Closes #384

See merge request piotr.gawron/minerva!292

Resolve "selection menu doesn't disappear"

Closes #382 and #390

See merge request piotr.gawron/minerva!291

Resolve "Context menu listener breaks when a SVG element is present"

Closes #385

See merge request piotr.gawron/minerva!290

Resolve "admin should be able to list all overlays"

Closes #391 and #392

See merge request piotr.gawron/minerva!289