Image Upload in Web Experiment

Description: Customers in any paid tier can now upload images to change/insert images in the web experiment visual editor.

Why: Customers have been asking for this simple feature for a while and now they are able to upload images just like in Guides and Surveys rather than upload to their own CDN and then manually copying the link.

Where: Visual Editor element toolbar or the 'Insert' panel (previously 'Widgets')

Available in EUDC: Yes