Thorsten Frommen

As of WordPress 4.4, the Get Shortlink button is hidden by default. This plugin brings it back. Yay.
Please note that the button does not exist at all in a Block Editor context. It will only show up when using the Classic Editor, for example, when editing a single attachment.

Bring Back the Get Shortlink Button

This plugin brings back the Get Shortlink button, which is hidden by default since WordPress 4.4.

Brian Layman

When you add this plugin, a metabox is added to the edit post/page screens that allows you to disable ShortCodes in that one particular post/page. Admittedly, this plugin may not be widely needed by the general public. However if you are a plugin developer or documenter, you might find it very useful.
If you want to show examples of how to use a ShortCode and not have that ShortCode activate upon display of the post, this plugin will come to your rescue. The SCuD will disable all ShortCode processing for any post.
SCuD is written to prevent any collateral damage. After the post content is displayed, it activates the all previously disabled ShortCodes again. This allows any ShortCodes that you may be using in sidebar widgets to process correctly.

SCuD – The ShortCode Disabler

Allows you to disable ShortCodes on a per post/page basis.

Bring Back the Get Shortlink Button vs SCuD – The ShortCode Disabler