fix #1740 better UI for edit btn when the image is deleted

admin/themes/default/js/history.js

@@ -301,7 +301,18 @@ function lineConstructor(line, id, imageDisplay) {
       fillHistoryResult(current_param);
     });
   }
-  newLine.find(".edit-img").attr("href", line.EDIT_IMAGE)
+
+  if (line.EDIT_IMAGE != "") {
+    newLine.find(".edit-img").attr("href", line.EDIT_IMAGE);
+  } else {
+    newLine.find(".edit-img")
+      .attr("href", "#")
+      .addClass("notClickable tiptip")
+      .attr('title', str_no_longer_exist_photo)
+      .on("click", (e) => {
+      e.preventDefault();
+    });
+  }
 
   switch (line.SECTION) {
     case "tags":

admin/themes/default/template/history.tpl

@@ -41,6 +41,7 @@ const str_favorites = "{'Your favorites'|translate}";
 const str_recent_cats = "{'Recent albums'|translate}";
 const str_recent_pics = "{'Recent photos'|translate}";
 const str_memories = "{'Memories'|translate}";
+const str_no_longer_exist_photo = "{'This photo no longer exists'|@translate}";
 const unit_MB = "{"%s MB"|@translate}";
 const str_guest = '{'guest'|@translate}';
 const guest_id = {$guest_id};
@@ -276,6 +277,10 @@ jQuery(document).ready( function() {
 
 <style>
 
+.notClickable {
+  opacity: 0.5;
+}
+
 .container {
   padding: 0 20px;
 }