[do not merge] comments

src/editor/editor_display.cpp

@@ -176,6 +176,8 @@ void editor_display::clear_help_string()
 
 void editor_display::set_help_string(const std::string& str)
 {
+	// Always update the internal string so we can toggle its visibility back
+	// at any time without having to ask the current editor_palette.
 	help_string_ = str;
 
 	clear_help_string();

src/editor/editor_display.hpp

@@ -108,7 +108,7 @@ class editor_display : public display
 	/** Whether the help text is currently shown. */
 	bool help_string_enabled_ = true;
 
-	/** Current help string. */
+	/** Current help string, cached for easy visibility toggling. */
 	std::string help_string_;
 };