start updating docs, other changes to file upload

src/server/file_manager.py

@@ -149,10 +149,10 @@ def create_filemanager_blueprint(base_dir, url_prefix='/files', auth_password=No
           </ul>
           <button onclick="bulkCut()">Bulk Cut Selected</button>
           <hr>
-          <h2>Upload File</h2>
+          <h2>Upload File(s)</h2>
           <form action="{{ url_for('filemanager.upload') }}" method="post" enctype="multipart/form-data">
             <input type="hidden" name="path" value="{{ rel_path }}">
-            <input type="file" name="file">
+            <input type="file" name="file" multiple>
             <input type="submit" value="Upload">
           </form>
           <hr>
@@ -276,11 +276,13 @@ def create_filemanager_blueprint(base_dir, url_prefix='/files', auth_password=No
             return "Invalid path", 400
         if not os.path.isdir(abs_path):
             return "Not a directory", 400
-        file = request.files.get('file')
-        if file:
-            filename = secure_filename(file.filename)
-            file.save(os.path.join(abs_path, filename))
-            flash("Uploaded successfully")
+        files = request.files.getlist('file')
+        if files:
+            for file in files:
+                if file and file.filename:
+                    filename = secure_filename(file.filename)
+                    file.save(os.path.join(abs_path, filename))
+            flash("Uploaded files successfully")
         return redirect(url_for('filemanager.index', path=rel_path))
 
     @filemanager.route('/rename', methods=['POST'])