There were still crashes where a Timer was called on an invalidated
object. Now, this timer is in Atomic and therefore gets destroyed with
the widget.
This way we can have multiple stylings running and it is more logical,
cleaner, and more general purpose.

For the styling timer we can not use the static version of singleShot,
because we must be able to stop it (when switching XMLs while something
is being highlighted).
Also, an INIParser object has been leaking

They should not be marked as missing in the confirmation box if they
have children (even though the key "REP#" itself does not exist)

This is useful for example when looking for METEOPATH --> different
plugins will have different panels loaded --> highlight them all

Missing INI keys are now listed more user friendly. If the user cancels
out of saving, the first missing key is jumped to and highlighted in
Inishell.

And minor cleanup

It can still either be a frame (border is flashed) but now also any kind
of input panel with it's respective key (it is highlighted for a short
period of time).

Now the tab close confirmation works again.
(you must delete your settings file)

Now numbers are correctly incremented when reading from ini files and
then clicking "+"

With recent changes we can just not exit out early and let the
SectionTab find the right index.

Now the user can individually turn off the confirmation dialog for when
a) an application has been opened, nothing was changed, and it is closed
again
b) an INI file has been opened, changes were made, and the application
is closed

This is nice because one of the messages could be annoying while the
other could be quite useful.

But - allow not to warn again.

Like finding the parent of a dynamic child panel, counting dynamic child
panels, ...

We use it three times now and getting an environment variable will not
slow it down...

Now if an unrelated tab has the same beginning but a non-numeric ending,
the child tab is sorted before it.

This way, new higher numbers get put in the back.

... instead of unsorted at the end.

The QTimer now always uses the original stylesheet avoiding fetching one
that is already colored (and restoring to that).

When opening context help the topic can now be anywhere on the page.
Also: QTabWidget::clear() clears the tabs but does not delete
anything... oops. Now we do this manually potentially saving big amounts
of memory and lookups.

Now it works multiple times!

Some further restructuring

This is an intermediate commit.

We need to be able to set the tab bar everything gets built into... so
first, split up some functionality.