Fix bugs with reblogged statuses

Including: Attachments not showing up, 3d touch peek/pop not working,
favorite/reblog not working

Tusker/MastodonCache.swift

@@ -27,6 +27,7 @@ class MastodonCache {
         statuses[id] = status
         add(account: status.account)
         if let reblog = status.reblog {
+            add(status: reblog)
             add(account: reblog.account)
         }
     }

Tusker/Views/Status/StatusTableViewCell.swift

@@ -32,6 +32,7 @@ class StatusTableViewCell: UITableViewCell, PreferencesAdaptive {
     
     var statusID: String!
     var accountID: String!
+    var reblogStatusID: String?
     var rebloggerID: String?
     
     var favorited: Bool = false {
@@ -74,21 +75,22 @@ class StatusTableViewCell: UITableViewCell, PreferencesAdaptive {
     }
     
     func updateUI(for statusID: String) {
-        self.statusID = statusID
-        guard let status = MastodonCache.status(for: statusID) else { fatalError("Missing cached status \(statusID)") }
+        guard var status = MastodonCache.status(for: statusID) else { fatalError("Missing cached status \(statusID)") }
         
-        let account: Account
-        if let reblog = status.reblog {
-            account = reblog.account
+        if let reblogID = status.reblog?.id,
+            let reblog = MastodonCache.status(for: reblogID) {
+            reblogStatusID = statusID
             rebloggerID = status.account.id
+            status = reblog
             reblogLabel.isHidden = false
         } else {
-            account = status.account
-            reblogLabel.isHidden = true
+            reblogStatusID = nil
             rebloggerID = nil
+            reblogLabel.isHidden = true
         }
+        let account = status.account
         self.accountID = account.id
-        
+        self.statusID = status.id
         
         updateUIForPreferences()
         
@@ -292,7 +294,7 @@ extension StatusTableViewCell: TableViewSwipeActionProvider {
                     }
                     completion(true)
                     MastodonCache.add(status: status)
-                    self.updateUI(for: self.statusID)
+                    self.updateUI(for: self.reblogStatusID ?? self.statusID)
                 }
             })
         }
@@ -320,7 +322,7 @@ extension StatusTableViewCell: TableViewSwipeActionProvider {
                     }
                     completion(true)
                     MastodonCache.add(status: status)
-                    self.updateUI(for: self.statusID)
+                    self.updateUI(for: self.reblogStatusID ?? self.statusID)
                 }
             })
         }