Fix SceneTreeDock invalid state after trying to remove internal Node #185

Fix SceneTreeDock invalid state after trying to remove internal Node

Usage Workflow file

10 errors and 3 warnings

missing return type after '->' ('int' assumed)

'hide_unused_editors': unknown override specifier

if a trailing return type is used then the leading return type shall be the single type-specifier 'auto' (not 'int')

missing type specifier - int assumed. Note: C++ does not support default-int

'int EditorNode::get_singleton(void)': overloaded function differs only by return type from 'EditorNode *EditorNode::get_singleton(void)'

'EditorNode::get_singleton': 'int (void)' differs in levels of indirection from 'EditorNode *(void)'

function 'EditorNode *EditorNode::get_singleton(void)' already has a body

syntax error: '('

syntax error: 'this'

syntax error: ')'

declaration of 'undo_redo' hides global declaration

declaration of 'undo_redo' hides global declaration

declaration of 'undo_redo' hides global declaration