This is done to ensure `mtools`-based operations leave a clean FS.

```
       b      Batch mode. Optimized for huge recursive copies, but less secure if a crash happens during the copy.
```

It seems the "less secure if a crash happens" does not need a crash to
happen.

With batch mode:

```
/[...]/.
  Start (0) does not point to parent (___)
```

For pretty much everything copied in.

Without batch mode, everything passes `fsck`.

See #51150

The utility switched from /usr/share to ${datadir}, but it is still not enough
for use. It would be nice if upstream provided configure flag.

iso-image: Verifies the FAT partition at build.

* lm_sensors: 3.4.0 -> 3.5.0 (#51117)

Using releases posted on github,
they work and I'm not sure how those fedora URL's are found anyway.

* lm_sensors: cleanup

4.18 series is EOL

This is 5437728 ported to Qt 5.6 and 5.9
LTS versions.

sage: misc fixes

Fix qtbase cmake for gui plugins [Qt 5.6, 5.9]

Should fix #51343, merely adding a scilab symlink within the bin/ directory, so that it can be detected by SageMath.