Add: Warn players that company passwords are not truly secure

src/widgets/misc_widget.h

@@ -30,11 +30,13 @@ enum AboutWidgets {
 
 /** Widgets of the #QueryStringWindow class. */
 enum QueryStringWidgets {
-	WID_QS_CAPTION, ///< Caption of the window.
-	WID_QS_TEXT,    ///< Text of the query.
-	WID_QS_DEFAULT, ///< Default button.
-	WID_QS_CANCEL,  ///< Cancel button.
-	WID_QS_OK,      ///< OK button.
+	WID_QS_CAPTION,    ///< Caption of the window.
+	WID_QS_TEXT,       ///< Text of the query.
+	WID_QS_WARNING,    ///< Warning label about password security
+	WID_QS_WARNINGBOX, ///< Container for warning label
+	WID_QS_DEFAULT,    ///< Default button.
+	WID_QS_CANCEL,     ///< Cancel button.
+	WID_QS_OK,         ///< OK button.
 };
 
 /** Widgets of the #QueryWindow class. */

src/widgets/network_widget.h

@@ -122,6 +122,7 @@ enum NetworkCompanyPasswordWidgets {
 	WID_NCP_LABEL,                    ///< Label in front of the password field.
 	WID_NCP_PASSWORD,                 ///< Input field for the password.
 	WID_NCP_SAVE_AS_DEFAULT_PASSWORD, ///< Toggle 'button' for saving the current password as default password.
+	WID_NCP_WARNING,                  ///< Warning text about password security
 	WID_NCP_CANCEL,                   ///< Close the window without changing anything.
 	WID_NCP_OK,                       ///< Safe the password etc.
 };