Drag&drop bug (#1157)

* Fixed issue that Drag and Droppped Files can not be deleted

* Deleted unnecessary Comment

src/main/resources/static/js/fileInput.js

@@ -104,4 +104,9 @@ function setupFileInput(chooser) {
       $(inputElement).siblings(".custom-file-label").addClass("selected").html(pdfPrompt);
     }
   }
+  //Listen for event of file being removed and the filter it out of the allFiles array
+  document.addEventListener("fileRemoved", function (e) {
+    const fileName = e.detail;
+    allFiles = allFiles.filter(file => file.name !== fileName);
+  });
 }

src/main/resources/static/js/merge.js

@@ -69,8 +69,13 @@ function attachMoveButtons() {
     removeButtons[i].addEventListener("click", function (event) {
       event.preventDefault();
       var parent = this.closest(".list-group-item");
+      //Get name of removed file
+      var fileName = parent.querySelector(".filename").innerText;
       parent.remove();
       updateFiles();
+      //Dispatch a custom event with the name of the removed file
+      var event = new CustomEvent("fileRemoved", { detail: fileName });
+      document.dispatchEvent(event);
     });
   }
 }