Add swipe to remove accounts in Preferences

Tusker/Screens/Preferences/PreferencesView.swift

@@ -37,7 +37,21 @@ struct PreferencesView: View {
                                 }
                             }
                         }
+                    }.onDelete { (indices: IndexSet) in
+                        var indices = indices
+                        var logoutFromCurrent = false
+                        if let index = indices.first(where: { localData.accounts[$0] == localData.getMostRecentAccount() }) {
+                            logoutFromCurrent = true
+                            indices.remove(index)
                         }
+                        
+                        localData.accounts.remove(atOffsets: indices)
+                        
+                        if logoutFromCurrent {
+                            self.logoutPressed()
+                        }
+                    }
+                    
                     Button(action: {
                         NotificationCenter.default.post(name: .addAccount, object: nil)
                     }) {