When triaging ideas you are trying to be as efficient as possible. It would be really nice to have a Next and Previous button on the idea detail screen so you didn't need to keep going over to the list to select the next one. A hotkey would be an added bonus.
Thank you for your idea. This is not currently planned on our roadmap but we will continue to monitor customer feedback on the idea.
In the meantime, one suggestion would be to use the Ideas -> List view and click to open the drawer view rather than the idea details. This would allow you to quickly work through the list of ideas.