Show/warn users about pending (unapproved) reservation requests
For scarce/single resources that are in demand, users can easily step on each other with reservation requests. This is because they have no visibility into pending requests. I propose that we show pending reservation requests on the "available resources" views, probably using a different color/marking to distinguish them. Additionally, we should email a warning to users that submit requests that overlap with existing unapproved requests. Finally, the "search" button on the reservation request page should take into account pending reservations when looking for an available window.