[setting] "Utils" -> "Rewrite Settings" gives Uncaught Error

### Affected hardware version

Bangle 2

### Your firmware version

2v29.392 (iflash - but have seen this on regular as well)

### The bug

Repro:
Go to and click "Settings" -> "Utils" -> "Rewrite Settings". Then the watch hangs. Recoverable by long press HW button to load the clock face.

Console output:
```
____ _
| __|___ ___ ___ _ _|_|___ ___
| __|_ -| . | _| | | | | . |
|____|___| _|_| |___|_|_|_|___|
|_| espruino.com
2v29.392 (c) 2026 G.Williams
Uncaught Error: Function code is null, not a string
at c (setting.app.js:41:191)
...);load("setting.app.js");
^
at select (:1:91)
...==typeof c)Bangle.haptic("touch"),c(b);else if("object"==typeof c)if(Bangle.hapt...
^
at :1:1
^
Uncaught Error: Function code is null, not a string
>
```

### Installed apps

_No response_

### Author

_No response_

Reproduce the hang through Settings → Utils → Rewrite Settings on a Bangle 2, then inspect setting.app.js around line 41 and the select entry point shown in the console output. Confirm the fix by repeating the action and verifying that the watch no longer reports “Function code is null, not a string” or hangs.

Written by the indexing model from the issue text.