Merge remote-tracking branch 'upstream/beta' into beta

ui/media/js/main.js

@@ -1,7 +1,7 @@
 "use strict" // Opt in to a restricted variant of JavaScript
 const HEALTH_PING_INTERVAL = 5 // seconds
 const MAX_INIT_IMAGE_DIMENSION = 768
-const MIN_GPUS_TO_SHOW_SELECTION = 1
+const MIN_GPUS_TO_SHOW_SELECTION = 2
 
 const IMAGE_REGEX = new RegExp('data:image/[A-Za-z]+;base64')
 
@@ -1460,4 +1460,17 @@ document.querySelectorAll(".tab").forEach(tab => {
     })
 })
 
+window.addEventListener("beforeunload", function(e) {
+    const msg = "Unsaved pictures will be lost!";
+
+    let elementList = document.getElementsByClassName("imageTaskContainer");
+    if (elementList.length != 0) {
+        e.preventDefault();
+        (e || window.event).returnValue = msg;
+        return msg;
+    } else {
+        return true;
+    }
+});
+
 createCollapsibles()