UI: settings show/hide update display (#1072)

* UI: settings show/hide update display

This PR replaces the PR #1003

In this PR, the visual for available update is added to the foreground.

There are new settings to generally show/hide the update display, and only administrators receive the update display.

* change to `Bean`

* Update AppUpdateShowService.java

* add update message

* revision service

* change shouldShow

* Update githubVersion.js

* rm folder

* Update AppUpdateService.java

src/main/resources/static/js/homecard.js

@@ -46,6 +46,12 @@ function reorderCards() {
   cards.sort(function (a, b) {
     var aIsFavorite = localStorage.getItem(a.id) === "favorite";
     var bIsFavorite = localStorage.getItem(b.id) === "favorite";
+    if (a.id === "update-link") {
+      return -1;
+    }
+    if (b.id === "update-link") {
+      return 1;
+    }
     if (aIsFavorite && !bIsFavorite) {
       return -1;
     }