I'm using a Budgie panel applet called Caffeine. Basically, you switch it on whenever you want to disable screen timeouts temporarily without changing the Power settings. There's also an input textbox which allows you to set the timer to any integer up to 1440 minutes.
Speaking of applets, my bottom Panel started to get cluttered after only adding 2 applets and showing the date, so I removed User Indicator and Notifications since their functionality is partially contained within Raven (but not completely). I wish there were more Raven applets, such as weather for example, so I woudn't need to use this unsupported 3rd party panel applet. I'm not complaining though because I'm getting what seems to be a great distro/desktop for free. It's fine the way it is, but a fool can wish... if only we could move some of this Panel stuff into Raven. I guess it's an "idea" for another thread, which probably already exists; sorry for getting slightly off-topic.
But yeah, budgie-caffeine-applet does what you want, and it's on the standard Solus repo.