-Ability to open resources in the same window

-Plenty of fixes and improvements to new inspector
-Fixes that were needed to make inspector work better

scene/gui/container.cpp

@@ -51,6 +51,8 @@ void Container::add_child_notify(Node *p_child) {
 	control->connect("size_flags_changed", this, "queue_sort");
 	control->connect("minimum_size_changed", this, "_child_minsize_changed");
 	control->connect("visibility_changed", this, "_child_minsize_changed");
+
+	minimum_size_changed();
 	queue_sort();
 }
 
@@ -61,6 +63,7 @@ void Container::move_child_notify(Node *p_child) {
 	if (!Object::cast_to<Control>(p_child))
 		return;
 
+	minimum_size_changed();
 	queue_sort();
 }
 
@@ -75,6 +78,8 @@ void Container::remove_child_notify(Node *p_child) {
 	control->disconnect("size_flags_changed", this, "queue_sort");
 	control->disconnect("minimum_size_changed", this, "_child_minsize_changed");
 	control->disconnect("visibility_changed", this, "_child_minsize_changed");
+
+	minimum_size_changed();
 	queue_sort();
 }