Fix rendering issues in children

gfx/prop/children.lua

@@ -90,12 +90,15 @@ function Children:with(elementType)
   end
 
   function elementType:draw()
+    local wasDirty = Element._isDirty(self);
     local dirty = Element.draw(self)
-    if Element._isDirty(self) then
+    if wasDirty then
       self:_getWindow().clear()
     end
-    for _,child in self:_iterateChildren() do
-      dirty = child:draw() or dirty
+    if dirty then
+      for _,child in self:_iterateChildren() do
+        dirty = child:draw() or dirty
+      end
     end
     return dirty
   end

itemcontroller.lua

@@ -573,6 +573,7 @@ local PAGES = {
       requestCapProgress:setProgress(pageState.request / group:getItemCount())
 
       requestCountList:adjustPositions()
+      stuffContainer:setDirty(true)
     end
 
     local function bindRequestButton(increment)