354 suggestion add images to overlay previews

[bullmoose20]

What type of PR is this?

• Bug Fix (non-breaking change which fixes an issue)
• [ x] Feature/Tweak (non-breaking change which adds new functionality or enhances existing functionality)
• Breaking Change (fix or feature that would break any existing functionality for users)
• Documentation Update
• Other

Description

• Always show image whether custom or default grey
• As overlays are selected, image shows it immediately
• offer url option that would download the image and ensure it's of the correct dimensions
• allow user to upload several different custom images making this similar to the start page
• have drop-down scan directory and show the one you selected when you left the page be the one you get when you return
• ability to delete images similar to the way we are able to delete config_name on start page

Related Issues [optional]

• Related Issue #
• Closes [Suggestion]: Add Images to Overlay Preview #354

Have you updated the Documentation to reflect changes (if necessary)?

• Yes
• [ x] No