Resolve #199 fix missing transectInspection update

closes #199 (closed)

Solution:

1. Get current/updated transectInspection list in onIonViewWillEnter-hook (since setup won't be called reliably all the time - see: Ionic Documentation).
2. Force to update the ion-slides component with :key="transectInsepctions.length" when a inspection is added (since ion-slides has a bug that prevents updating the slides per default and which won't be fixed for our version, see: bug report)