ImageButtonAdapter now assigns OnClickListener to every button it
contains. Buttons in ShowUserActivity are now clickable, leading to
edition page. Forcing the edition page to display the correct
device/activity/production remains to be done.#
Removed amount from ElectricDevice model, removec controls for amount and
StandbyHoursPerDay in AddElectricDeviceActivity, added control
"isDeviceRunningStandby", and StandbyHoursPerDay are calculated based on
this variable and hoursPerDay for given ElectricDevice.#