Previously the presets handler in the GUI was on a timer. Because of
this, error messages got suppressed after the first one (even if the
error message is different from the one originally suppressed).
Add a "reload presets" button which forces the preset to reload, and
always provides an error message if the reload failed.
Fixes: #26707
Run the `clang-format.bash` script to update all our C and C++ code to a
new style defined by `.clang-format`, now with "east const" enforcement.
Use `clang-format` version 18.
* If you reached this commit for a line in `git blame`, re-run the blame
operation starting at the parent of this commit to see older history
for the content.
* See the parent commit for instructions to rebase a change across this
style transition commit.
Issue: #26123
Kitware Robot