XML: Move reflections

Move reflections to main section. Not video section
Also add reflections up to 55
"Random" feature updates.  Video reflection updates. Misc updates

Remove "Random" feature from submenu (only on browser now)
Change "Random" text to "Another"
Make "Video Reflections" random only
Update alarm help text
Rename HeadlessDataNode.experimentMenu to HeadlessDataNode.experimentGroup for clarity