Toggle visibility with SetShown instead of Show/Hide branches

Each if/else that only showed one object in one branch and hid it in the other is now ClassicAPI's SetShown, which shows on any truthy value. 21 sites across 10 modules.

modules/equipmentmanager.lua

@@ -778,7 +778,7 @@ pfUI:RegisterModule("equipmentmanager", function()
   function UpdatePopouts()
     local show = PopoutsActive()
     for _, b in ipairs(popoutButtons) do
-      if show then b:Show() else b:Hide() end
+      b:SetShown(show)
     end
     if not show then flyout:Hide() end
   end
@@ -831,7 +831,7 @@ pfUI:RegisterModule("equipmentmanager", function()
     -- uncommitted user changes show immediately.
     local setIgnored = selectedSetID and GetEffectiveIgnored(selectedSetID) or {}
     for slotID, overlay in pairs(slotOverlays) do
-      if frame:IsShown() and selectedSetID and setIgnored[slotID] then overlay:Show() else overlay:Hide() end
+      overlay:SetShown(frame:IsShown() and selectedSetID and setIgnored[slotID])
     end
 
     local hasSelection = selectedSetID and true or false
@@ -1170,7 +1170,7 @@ pfUI:RegisterModule("equipmentmanager", function()
 
     unusedGrid.ScrollBox:SetDataProvider(CreateDataProvider(list), ScrollBoxConstants.RetainScrollPosition)
 
-    if total == 0 then unusedPanel.empty:Show() else unusedPanel.empty:Hide() end
+    unusedPanel.empty:SetShown(total == 0)
 
     bagHighlight.active = true
     bagHighlight.locs = {}