Fixed bug caused by me forgetting what types im using (invites appearing at...

Fixed bug caused by me forgetting what types im using (invites appearing at the bottom of the list instead of the top when priority sorting was off)

src/RoomInfoListItem.cpp

@@ -338,7 +338,7 @@ enum NotificationImportance : short
         Invite             = 3
 };
 
-unsigned short int
+short int
 RoomInfoListItem::calculateImportance() const
 {
         // Returns the degree of importance of the unread messages in the room.

src/RoomInfoListItem.h

@@ -72,7 +72,7 @@ public:
         void updateUnreadMessageCount(int count, int highlightedCount);
         void clearUnreadMessageCount() { updateUnreadMessageCount(0, 0); };
 
-        unsigned short int calculateImportance() const;
+        short int calculateImportance() const;
 
         QString roomId() { return roomId_; }
         bool isPressed() const { return isPressed_; }