Fix compile issue and miniwindows index

modules/corelib/ui/uiminiwindow.lua

@@ -245,6 +245,7 @@ function UIMiniWindow:saveParentIndex(parentId, index)
   selfSettings.parentId = parentId
   selfSettings.index = index
   self:setSettings(selfSettings)
+  self.miniIndex = index
 end
 
 function UIMiniWindow:disableResize()

src/framework/core/application.cpp

@@ -21,6 +21,7 @@
  */
 
 #include "application.h"
+#include <csignal>
 #include <framework/core/clock.h>
 #include <framework/core/resourcemanager.h>
 #include <framework/core/modulemanager.h>