Changed import workflow

-Rearrange favorites in fs dock with drag and drop
-Removed import -> sub-scene, moved to scenetree contextual menu
-Removed import -> re-import , moved and integrated to FS dock
-Added ability in FS dock to re-import more than one resource
simultaneously
-Added ability to drag from native filesystem explorer to Godot, only
works on Windows though
-Removed scene reimport merge options, never worked well. Eventually
merging materials should be re-added
-Added ability to set custom root node type when importing scenes
-Re-Import is now automatic, can be configured back to manual in editor
settings
-Added resource previews in property list for many resource types

core/object.cpp

@@ -1756,6 +1756,7 @@ bool Object::is_queued_for_deletion() const {
 void Object::set_edited(bool p_edited) {
 
 	_edited=p_edited;
+	_edited_version++;
 }
 
 bool Object::is_edited() const {
@@ -1763,6 +1764,11 @@ bool Object::is_edited() const {
 	return _edited;
 
 }
+
+uint32_t Object::get_edited_version() const {
+
+	return _edited_version;
+}
 #endif
 
 Object::Object() {
@@ -1778,6 +1784,7 @@ Object::Object() {
 #ifdef TOOLS_ENABLED
 
 	_edited=false;
+	_edited_version=0;
 #endif
 
 #ifdef DEBUG_ENABLED