Annual electricity cost prediction tool restarts Predbat

[novocane1337]

Describe the bug
When running the Whatif simulation it restarts Predbat if I chose another Tariff from the drop down box and press save. If I just select the tariff and press Run simulation without saving it also restart Predbat.

It works fine on my default tariff.

Expected behaviour

Was hoping to compare against other custom tariffs or other tariffs is the list

Predbat version

v8.47.1

predbat.log

[chalfontchubby]

Same root cause as #4397 - fix up in #4401.

[chalfontchubby]

⚠️ Same warning as posted on #4397: until #4401 is merged, running/saving on the WhatIf page can restart your live Predbat instance and reset real settings back to defaults, not just interrupt the run. Recommend holding off on a live production instance until the fix lands.