Arsenal - Improved sorting, insignia detection, identity info verification and minor cleanup

[johnb432]

When merged this pull request will:

• Sorting now uses the previously within ACE unused lbSetTextRight.
  This does conflict with ACE Arsenal Extended, as it also uses that, however it isn't game breaking.
• The "Empty" entry should now always be at the top. However, given the disparities between the wiki and what I found, I'm not sure if this is guaranteed to always be true.
• Arsenal - Left panel code improvements #9787 improved insignia source detection (mission, campaign or config). This PR adds those changes to sorting and the item info which is displayed in the bottom right.
• Added GVAR(currentInsignia) to the list of insignia to display, so that if the insignia you have is not present in the arsenal, it won't disappear. It's not a very robust or elegant solution, as if you unselect the insignia that's unavailable in the arsenal and change tabs, it will lose the insignia. However, losing an insignia is far less important than losing actual gear, so for now this ought to do, as it's a very easy solution.
• Removed an unnecessary file and adjusted a header and comment in FUNC(addListBoxItem).
• Made saving in loadouts be config case sensitive.

IMPORTANT

• If the contribution affects the documentation, please include your changes in this pull request so the documentation will appear on the website.
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• Title of this PR uses our standard template Component - Add|Fix|Improve|Change|Make|Remove {changes}.

[LinkIsGrim]

We should notify ACEAX's author about this before release

[LinkIsGrim]

I've added removal of missing extended info for face/voice/insignia as well as logging, plus passed the relevant arrays to the event so third party can modify them as well.

[LinkIsGrim]

lack of arrayIntersect was intentional in case duplicates were added during event handling