Display each drive filebrowser in a separate side panel

package.json

@@ -73,6 +73,7 @@
         "eslint-config-prettier": "^8.8.0",
         "eslint-plugin-prettier": "^5.0.0",
         "jest": "^29.2.0",
+        "jupyterlab-unfold": "0.3.0",
         "mkdirp": "^1.0.3",
         "npm-run-all": "^4.1.5",
         "prettier": "^3.0.0",

schema/widget.json

@@ -1,6 +1,6 @@
 {
   "jupyter.lab.toolbars": {
-    "FileBrowser": [
+    "DrivePanel": [
       {
         "name": "new-directory",
         "command": "filebrowser:create-new-directory",
@@ -19,6 +19,67 @@
   "title": "'@jupyter/drives",
   "description": "jupyter-drives settings.",
   "type": "object",
-  "properties": {},
-  "additionalProperties": false
+  "jupyter.lab.transform": true,
+  "properties": {
+    "toolbar": {
+      "title": "File browser toolbar items",
+      "description": "Note: To disable a toolbar item,\ncopy it to User Preferences and add the\n\"disabled\" key. The following example will disable the uploader button:\n{\n  \"toolbar\": [\n    {\n      \"name\": \"uploader\",\n      \"disabled\": true\n    }\n  ]\n}\n\nToolbar description:",
+      "items": {
+        "$ref": "#/definitions/toolbarItem"
+      },
+      "type": "array",
+      "default": []
+    }
+  },
+  "additionalProperties": false,
+  "definitions": {
+    "toolbarItem": {
+      "properties": {
+        "name": {
+          "title": "Unique name",
+          "type": "string"
+        },
+        "args": {
+          "title": "Command arguments",
+          "type": "object"
+        },
+        "command": {
+          "title": "Command id",
+          "type": "string",
+          "default": ""
+        },
+        "disabled": {
+          "title": "Whether the item is ignored or not",
+          "type": "boolean",
+          "default": false
+        },
+        "icon": {
+          "title": "Item icon id",
+          "description": "If defined, it will override the command icon",
+          "type": "string"
+        },
+        "label": {
+          "title": "Item label",
+          "description": "If defined, it will override the command label",
+          "type": "string"
+        },
+        "caption": {
+          "title": "Item caption",
+          "description": "If defined, it will override the command caption",
+          "type": "string"
+        },
+        "type": {
+          "title": "Item type",
+          "type": "string",
+          "enum": ["command", "spacer"]
+        },
+        "rank": {
+          "title": "Item rank",
+          "type": "number",
+          "minimum": 0,
+          "default": 50
+        }
+      }
+    }
+  }
 }