added home button

Signed-off-by: Stephan Richter <s.richter@srsoftware.de>

de.srsoftware.cal.web/src/main/resources/occ.css

@@ -170,3 +170,6 @@ table#eventlist{
 .eventlist tr:nth-child(4n) {
   background: khaki;
 }
+.home{
+float:left;
+}

de.srsoftware.cal.web/src/main/resources/script/event.js

@@ -16,6 +16,10 @@ function attachmentList(json){
     }
 }
 
+function goHome(){
+    window.location.href = '/';
+}
+
 async function handleEventData(response){
     if (response.ok){
         var event = await response.json();
@@ -52,6 +56,13 @@ function loadEventData(){
     const urlParams = new URLSearchParams(window.location.search);
     var id = urlParams.get('id');
     if (id) fetch('/api/event?id='+id).then(handleEventData);
+    if (window.self == window.top){
+    var btn = document.createElement('button');
+        btn.innerHTML = '⌂ home';
+        btn.onclick = goHome;
+        btn.setAttribute('class','home');
+        element('buttons').appendChild(btn);
+    }
 }
 
 async function handleDeleted(response){