The weapon laser codes can be set more easily from the weapon laser code
combo box. Setting the properties explicitly here will just cause
conflicts and annoying UI bugs. Hide those properties from the UI.
This makes it possible to have the right laser code set for hot start
aircraft that (typically) do not allow changing laser codes when the
engine is on.
Use the new data from pydcs to improve the properties UI:
* Use human readable names
* Use appropriate control types
* Limit min and max values as appropriate for each property
* Show labels
Fixes https://github.com/dcs-liberation/dcs_liberation/issues/3090.
When a new payload file would be saved, the subsequent flight would always throw an exception (until Retribution would be restarted) because the payload_cache wasn't updated until now.
Added a check for the existence of a payloads folder. Also made the _save_payloads lookup and path generation the same as _backup_payloads method to have consistency.
This appears to be incompatible with pyinstaller. I get the following
when trying to run the executable generated with pyside6:
```
Traceback (most recent call last):
File "qt_ui\main.py", line 29, in <module>
File "PyInstaller\loader\pyimod03_importers.py", line 476, in exec_module
File "qt_ui\windows\QLiberationWindow.py", line 28, in <module>
File "PyInstaller\loader\pyimod03_importers.py", line 476, in exec_module
File "qt_ui\widgets\map\QLiberationMap.py", line 11, in <module>
ImportError: could not import module 'PySide6.QtPrintSupport'
```
The only parts of the old weapon data that worked well (didn't commonly
result in empty pylons) did this implicitly, so make the grouping
explicit.
This also moves the data out of Python and into the resources, which
both makes the data moddable and isolates us from a huge amount of
effort and a save compat break whenever ED changes weapon names.
I didn't auto migrate the old data since the old groups were not
explict and there's no way to infer the grouping. Besides, since most of
the weapons were *not* grouped, the old data did more harm than good in
my experience. I've handled the AIM-120 and AIM-7 for now, but will get
at least all the fox 3 missiles before we ship.
Aircraft that have no loadouts at all (such as the IL-78M) will have no
loadouts and thus no values in the dropdown menu. If the player toggles
the custom layout box we reset the flight's loadout to the selected
loadout, and with no loadouts in the combo box that is None, and
`Flight.loadout` isn't supposed to be optional.
Check for that case in the loadout selector and replace with an empty
loadout if that happens.
Fixes https://github.com/dcs-liberation/dcs_liberation/issues/1402
Loadout selection no longer has two (disagreeing) implementations. What
the UI shows is now what the miz will have.
We now store the chosen layout in the Flight *always*, not just for
custom loadouts. This means that we do loadout lookups at the start of
each turn, but the data is cached in pydcs.
Era-specific loadout degradation is still done at generation (and
presentation) time. This is so that players can toggle that option and
have it affect the *current* turn, rather than the next one.
