fix possible mapview crash

modules/core_lib/widgets/uiresizeborder.lua

@@ -10,6 +10,7 @@ end
 
 function UIResizeBorder:onHoverChange(hovered)
   if hovered then
+    if g_ui.getDraggingWidget() then return end
     if self:getWidth() > self:getHeight() then
       Mouse.setVerticalCursor()
       self.vertical = true
@@ -17,13 +18,15 @@ function UIResizeBorder:onHoverChange(hovered)
       Mouse.setHorizontalCursor()
       self.vertical = false
     end
+    self.hovering = true
     if not self:isPressed() then
       Effects.fadeIn(self)
     end
   else
-    if not self:isPressed() then
+    if not self:isPressed() and self.hovering then
       Mouse.restoreCursor()
       Effects.fadeOut(self)
+      self.hovering = false
     end
   end
 end
@@ -63,6 +66,7 @@ function UIResizeBorder:onMouseRelease(mousePos, mouseButton)
   if not self:isHovered() then
     Mouse.restoreCursor()
     Effects.fadeOut(self)
+    self.hovering = false
   end
 end
 

modules/game/widgets/uiminiwindow.lua

@@ -73,3 +73,6 @@ function UIMiniWindow:onMinimize()
   end
 end
 
+function UIMiniWindow:getClassName()
+  return 'UIMiniWindow'
+end

modules/game/widgets/uiminiwindowcontainer.lua

@@ -8,8 +8,10 @@ function UIMiniWindowContainer.create()
 end
 
 function UIMiniWindowContainer:onDrop(widget, mousePos)
-  widget:setParent(self)
-  return true
+  if widget:getClassName() == 'UIMiniWindow' then
+    widget:setParent(self)
+    return true
+  end
 end
 
 function UIMiniWindowContainer:getClassName()