Index: /CKEditor/trunk/_source/plugins/floatpanel/plugin.js
===================================================================
--- /CKEditor/trunk/_source/plugins/floatpanel/plugin.js	(revision 6961)
+++ /CKEditor/trunk/_source/plugins/floatpanel/plugin.js	(revision 6962)
@@ -401,4 +401,6 @@
 				{
 					delete activeChild.onHide;
+					// Sub panels don't manage focus. (#7881)
+					delete activeChild._.returnFocus;
 					delete this._.activeChild;
 					activeChild.hide();