Bug - Blurb toolbar doesn't work on blurbs with a link assigned

[jameshawkinscodes]

The blurb toolbar allows users to move a blurb container up or down the container order. It also allows the user to delete a blurb.

The issue: If a user assigns a link to a blurb, the toolbar becomes unusable. Click on the toolbar with activate the link instead of the toolbar features.

[jameshawkinscodes]

Updated the handleContainerClick function on Blurb.tsx to include event.preventDefault();

Tested on workbench and it functioned correctly.