This shall prevent unpredictable results caused by such a user configuration:

```
"ft:go" {
	"filetype": "c"
}
```

Like in NewBuffer(), we need to update glob-based local settings
before updating the filetype, since the filetype itself may be among those
glob-based local settings.

In `ReloadSettings()` the `filetype` can change upon globbed path given by
the `settings.json` or by identifying a different `filetype` based on the
file name given or pattern present inside the file.
To prevent further recursion caused by checking the `filetype` again, its
processing stops here and isn't considered in `DoSetOptionNative()`
once again where the callbacks are usually triggered.

Setting options directly in (h.)Buf.Settings without calling SetOption() or
SetOptionNative() is generally not the best idea, since it may not
trigger the needed side effects.
In particular, after micro-editor#3343,
directly setting `diffgutter` and `ruler` causes them not being tracked as
locally overridden per buffer, so if we run the `reload` command,
it unexpectedly replaces them with the default ones.