media-views.min.js?ver=5.0:1 Uncaught TypeError: this.activateMode is not a function

#### Steps to reproduce the issue

1. Run Jetpack in development mode
2. Install GravityForms Gutenberg add-on or any plugin using lodash
3. Create Custom Block with create-guten-block that uses the MediaUpload component
3. Go to the block editor
4. Look in the console to see the following error

```
media-views.min.js?ver=5.0:1 Uncaught TypeError: this.activateMode is not a function
at media-views.min.js?ver=5.0:1
at arrayEach (core.min.js?ver=1544551272:1645)
at Function.forEach (core.min.js?ver=1544551272:10473)
at n._createModes (media-views.min.js?ver=5.0:1)
at n.initialize (media-views.min.js?ver=5.0:1)
at n.initialize (media-views.min.js?ver=5.0:1)
at n.initialize (media-views.min.js?ver=5.0:1)
at n.e.View (backbone.min.js?ver=1.2.3:1)
at n.constructor (wp-backbone.min.js?ver=5.0:1)
at n.constructor (media-views.min.js?ver=5.0:1)
```

#### What I expected

Custom blocks to work fine.

#### What happened instead
`This block encountered an error and cannot be previewed`

Start by reproducing the issue in Jetpack development mode with a Gravity Forms Gutenberg add-on or another lodash-using plugin, then create a custom block with create-guten-block and MediaUpload. Inspect the MediaUpload and media-views initialization path associated with the reported stack trace; done means the custom block previews normally without the activateMode error.

Written by the indexing model from the issue text.