Merge branch 'lmazet/trivabble-help_message' into develop

diff --cc public/index.html
Simple merge

diff --cc public/trivabble.js
index 3d6414ec93bc8799b86b39a6b39f2badd7765890,a9d373176a6bf3e6be211ee662527075581e1bc5..9135ca1b00a3198823cfacd6cce486d22362afbd
--- 1/public/trivabble.js
--- 2/public/trivabble.js
+++ b/public/trivabble.js
@@@ -2084,8 -1955,27 +2075,27 @@@
          }
      }
  
+     function nextHelpMessage() {
+         if (typeof nextHelpMessage.index === "undefined") {
+             nextHelpMessage.index = -1;
+         }
+ 
+         const helpMessages = document.getElementById("help-messages");
+         if (helpMessages) {
+             const listOfMessages = helpMessages.getElementsByTagName("p");
+             if ((nextHelpMessage.index >= 0) && (nextHelpMessage.index < listOfMessages.length)) {
+                 listOfMessages[nextHelpMessage.index].style.display = "none";
+             }
+             nextHelpMessage.index++;
+             if (nextHelpMessage.index === listOfMessages.length) {
+                 nextHelpMessage.index = 0;
+             }
+             listOfMessages[nextHelpMessage.index].style.display = "";
+         }
+     }
+ 
      function repromptName(f) {
 -        if (localStorage.trivabblePlayerName && localStorage.trivabblePlayerName.trim()) {
 +        if (getSetting("trivabblePlayerName") && getSetting("trivabblePlayerName").trim()) {
              f();
          } else {
              myPrompt(