Ensure settings change toast informs user a restart is required.

[Steve-Mcl]

closes #2581

Description

• Adds 'NOTE: changes will be applied once the instance is restarted.' to the toast message on Editor and Security tabs
• Tweaks the existing message on Launcher Settings (aligns with the Editor and Security tab) - to keep same messaging throughout.

Related Issue(s)

Closes #2581

Checklist

• [x] I have read the contribution guidelines
• [ ] Suitable unit/system level tests have been added and they pass
• [ ] Documentation has been updated
  • [ ] Upgrade instructions
  • [ ] Configuration details
  • [ ] Concepts
• [ ] Changes flowforge.yml?
  • [ ] Issue/PR raised on FlowFuse/helm to update ConfigMap Template
  • [ ] Issue/PR raised on FlowFuse/CloudProject to update values for Staging/Production

Labels

• [ ] Includes a DB migration? -> add the area:migration label

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 78.71%. Comparing base (60e704a) to head (49aed17).

:exclamation: Current head 49aed17 differs from pull request most recent head 878000e

Please upload reports for the commit 878000e to get more accurate results.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #4053 +/- ## ======================================= Coverage 78.71% 78.71% ======================================= Files 284 284 Lines 13008 13008 Branches 2897 2897 ======================================= Hits 10239 10239 Misses 2769 2769 ``` | [Flag](https://app.codecov.io/gh/FlowFuse/flowfuse/pull/4053/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=FlowFuse) | Coverage Δ | | |---|---|---| | [backend](https://app.codecov.io/gh/FlowFuse/flowfuse/pull/4053/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=FlowFuse) | `78.71% <ø> (ø)` | | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=FlowFuse#carryforward-flags-in-the-pull-request-comment) to find out more.

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[Steve-Mcl]

Updated wording in reword to remove doubt about this being auto or manual restart

NOTE: this now also touches the Env Vars file which was used as a basis for the original modifications. In short, it keeps them in line with one another.

[joepavitt]

Just waiting for final tests to pass before merging