IconPicker: If a spell id is entered, show the icon for that spell id

Instead of the current behaviour of searching for the name of the spell
and then showing all icons that match the name.

I don't think anyone will miss that behaviour.

Fixes: WeakAuras#4667

WeakAurasOptions/OptionsFrames/IconPicker.lua

@@ -32,18 +32,6 @@ local function ConstructIconPicker(frame)
   local function iconPickerFill(subname, doSort)
     scroll:ReleaseChildren();
 
-    -- Work around special numbers such as inf and nan
-    if (tonumber(subname)) then
-      local spellId = tonumber(subname);
-      if (abs(spellId) < math.huge and tostring(spellId) ~= "nan") then
-        subname = GetSpellInfo(spellId)
-      end
-    end
-
-    if subname then
-      subname = subname:lower();
-    end
-
     local usedIcons = {};
     local AddButton = function(name, icon)
       local button = AceGUI:Create("WeakAurasIconButton");
@@ -57,6 +45,24 @@ local function ConstructIconPicker(frame)
       usedIcons[icon] = true;
     end
 
+    -- Work around special numbers such as inf and nan
+    if (tonumber(subname)) then
+      local spellId = tonumber(subname);
+      if (abs(spellId) < math.huge and tostring(spellId) ~= "nan") then
+        local name, _, icon = GetSpellInfo(spellId)
+        if name then
+          AddButton(name, icon)
+        end
+        return;
+      end
+    end
+
+    if subname then
+      subname = subname:lower();
+    end
+
+
+
     local num = 0;
     if(subname and subname ~= "") then
       for name, icons in pairs(spellCache.Get()) do