Squish Tests: Missing experiment setup files

As a developer I would like to verify the following behaviour using Squish:

- In the `DAE` perspective, in the `Experiment Setup` tab:
- In the `Time Channels` tab, when there are no TCB files, a message is shown pointing to the correct location to place files.
- In the `Data Acquisition` tab, when there are no wiring/detector/spectra table files, a message is shown pointing to the correct locations to place files.
- In the `Periods` tab, when there are no period files, a message is shown pointing to the correct location to place files.

#### Additional info:
TCB - `C:\Instrument\Settings\config\\configurations\tcb`
Wiring/Detector/Spectra/Period - `C:\Instrument\Settings\config\\configurations\tables`

Inizia con i test Squish per la prospettiva DAE e la scheda Experiment Setup, se presente. Esegui i test delle schede Time Channels, Data Acquisition e Periods senza i file indicati, quindi verifica che ciascuna visualizzi un messaggio che rimandi alla posizione configuration\tcb o configuration\tables specificata.

Scritto dal modello di indicizzazione a partire dal testo della issue.