Backend improvements and bug fixes

- Fixed an error when hovering over some spells in the Auras panel on the Player Breakdown window.
- Fixed the character item level, which was not showing for players that left the party group on the Player Breakdown window.
- Fixed boss images not showing at the segments selection menu.
- Other updates related to encounter journal and mythic+, both under development.

frames/window_cdtracker.lua

@@ -288,7 +288,7 @@ end
                 classId = select(3, UnitClass(unitInfo.nameFull))
             end
 
-            if (unitInfo and classId) then
+            if (unitInfo and classId and cooldownsOrganized[classId]) then
                 local allCooldownFrames = Details222.CooldownTracking.GetAllCooldownFrames()
 
                 for spellId, cooldownInfo in pairs(unitCooldowns) do