diff --git a/modules/corelib/ui/uiminiwindow.lua b/modules/corelib/ui/uiminiwindow.lua
index 6251b1f126..ba2a77c4ad 100644
--- a/modules/corelib/ui/uiminiwindow.lua
+++ b/modules/corelib/ui/uiminiwindow.lua
@@ -14,10 +14,11 @@ function UIMiniWindow:open(dontSave)
     self:setSettings({ closed = false })
   end
 
-  addEvent(function()
-    self:raise()
+  self:raise()
+
+  if self:getParent() then
     self:getParent():saveChildren()
-  end)
+  end
 
   signalcall(self.onOpen, self)
 end
@@ -555,6 +556,16 @@ function UIMiniWindow:getMaximumHeight()
   return resizeBorder:getMaximum()
 end
 
+function UIMiniWindow:modifyMaximumHeight(height)
+  local resizeBorder = self:getChildById('bottomResizeBorder')
+  local newHeight = resizeBorder:getMaximum() + height
+  local curHeight = self:getHeight()
+  resizeBorder:setMaximum(newHeight)
+  if newHeight < curHeight or newHeight - height == curHeight then
+    self:setHeight(newHeight)
+  end
+end
+
 function UIMiniWindow:isResizeable()
   local resizeBorder = self:getChildById('bottomResizeBorder')
   return resizeBorder:isExplicitlyVisible() and resizeBorder:isEnabled()