mercenaries aren't appointed officials

docs/changelog.txt

@@ -67,6 +67,7 @@ Template for new versions:
 ## Fixes
 - `zone`: races without specific child or baby names will now get generic child/baby names instead of an empty string
 - `zone`: don't show animal assignment link for cages and restraints linked to dungeon zones (which aren't normally assignable)
+- `sort`: don't count mercenaries as appointed officials in the squad assignment screen
 - `dwarfvet`: fix invalid job id assigned to ``Rest`` job, which could cause crashes on reload
 
 ## Misc Improvements

plugins/lua/sort.lua

@@ -978,7 +978,11 @@ local function is_in_military(unit)
 end
 
 local function is_elected_or_appointed_official(unit)
-    if #unit.occupations > 0 then return true end
+    for _,occupation in ipairs(unit.occupations) do
+        if occupation.type ~= df.occupation_type.MERCENARY then
+            return true
+        end
+    end
     for _, noble_pos in ipairs(dfhack.units.getNoblePositions(unit) or {}) do
         if noble_pos.position.flags.ELECTED or
             (noble_pos.position.mandate_max == 0 and noble_pos.position.demand_max == 0)