Feature/76 fix dashboard cycles

#76 (closed) Fix Dashboard Cycles

Additions

• Fixed some warnings and erros on dashboard components
• Integrated intervals between transductor measurements and campuses. First a loop is started for each transducer and when it passes through all transductors, the tab changes to the next campus
• Cycle time between transductors to 5 seconds
• Added a progress bar for transductor list
• Improved the active tab indicator

Issues

• The endpoint returned from the backend always returns the same set of transductors, regardless of the campus id passed to query param "campi_id" (issue #118)