Rebased code after merge upstream, added partial input form. Form still needs some work.

Author: kpinnipa

.gitignore

@@ -4,6 +4,7 @@ node_modules/
 *.egg-info/
 .ipynb_checkpoints
 *.tsbuildinfo
+*.ipynb
 
 */labextension/*.tgz
 # Created by https://www.gitignore.io/api/python

src/index.ts

@@ -10,8 +10,6 @@ import {
 
 import { ICommandPalette } from '@jupyterlab/apputils';
 
-import { Widget } from '@lumino/widgets';
-
 import { CodeSnippetWidget } from './CodeSnippetWidget';