set a better initial size to TextEdit nodes

Address #15163

scene/resources/default_theme/default_theme.cpp

@@ -448,10 +448,10 @@ void fill_default_theme(Ref<Theme> &theme, const Ref<Font> &default_font, const
 
 	// TextEdit
 
-	theme->set_stylebox("normal", "TextEdit", make_stylebox(tree_bg_png, 3, 3, 3, 3));
+	theme->set_stylebox("normal", "TextEdit", make_stylebox(tree_bg_png, 3, 3, 3, 3, 0, 0, 0, 0));
 	theme->set_stylebox("focus", "TextEdit", focus);
-	theme->set_stylebox("read_only", "TextEdit", make_stylebox(tree_bg_disabled_png, 4, 4, 4, 4));
-	theme->set_stylebox("completion", "TextEdit", make_stylebox(tree_bg_png, 3, 3, 3, 3));
+	theme->set_stylebox("read_only", "TextEdit", make_stylebox(tree_bg_disabled_png, 4, 4, 4, 4, 0, 0, 0, 0));
+	theme->set_stylebox("completion", "TextEdit", make_stylebox(tree_bg_png, 3, 3, 3, 3, 0, 0, 0, 0));
 
 	theme->set_icon("tab", "TextEdit", make_icon(tab_png));