+ DONE - save/restore database
+ DONE - into the room local step remains -1
+ DONE - centralize all '<script ...' incapsulation to allow multiple transport system.
+ DONE - BUG: access with password from 2 diff browsers the second go in strange "page not found"
+ in the first tentative, the second works
+ DONE - BUG: access with password from 2 diff browsers place the first in a strict loop (the
+ problem was a call to a static parent method instead of the overrided child method,
+ substitute self:: with the dynamically get class::)
+ DONE - garbage management