improved comments

ElementX/Sources/Screens/RoomScreen/RoomScreenModels.swift

@@ -172,9 +172,10 @@ struct RoomScreenViewState: BindableState {
  var isPinningEnabled = false
  var lastScrollDirection: ScrollDirection?
 
- // The `pinnedEventIDs` is used only to determine if an item can be pinned or not since it does not depend on the pinned events timeline, but on the room info update which is faster
+ // The `pinnedEventIDs` are used only to determine if an item is already pinned or not.
+ // It's updated from the room info, so it's faster than using the timeline
  var pinnedEventIDs: Set<String> = []
- // This is used to controler the banner
+ // This is used to control the banner
  var pinnedEventsState = PinnedEventsState()
 
  var shouldShowPinnedEventsBanner: Bool {