Fixed selected text turning black, issue 5199

(cherry picked from commit 7f98f37f13)

scene/gui/text_edit.cpp

@@ -4389,6 +4389,7 @@ TextEdit::TextEdit()  {
 	scroll_past_end_of_file_enabled=false;
 	auto_brace_completion_enabled=false;
 	brace_matching_enabled=false;
+	highlight_all_occurrences=false;
 	auto_indent=false;
 	insert_mode = false;
 }