Restrict OPML import for Account types that don't support it

iOS/Settings/SettingsView.swift

@@ -93,19 +93,27 @@ struct SettingsView : View {
 	
 	var createSubscriptionsImportAccounts: ActionSheet {
 		var buttons = [ActionSheet.Button]()
+		
 		for account in viewModel.activeAccounts {
+			if !account.isOPMLImportSupported {
+				continue
+			}
+			
 			let button = ActionSheet.Button.default(Text(verbatim: account.nameForDisplay)) {
 				self.subscriptionsImportAccounts = nil
 				self.subscriptionsImportDocumentPicker = Modal(SettingsSubscriptionsImportDocumentPickerView(account: account))
 			}
+			
 			buttons.append(button)
 		}
+		
 		buttons.append(.cancel { self.subscriptionsImportAccounts = nil })
 		return ActionSheet(title: Text("Import Subscriptions..."), message: Text("Select the account to import your OPML file into."), buttons: buttons)
 	}
 	
 	var createSubscriptionsExportAccounts: ActionSheet {
 		var buttons = [ActionSheet.Button]()
+		
 		for account in viewModel.accounts {
 			let button = ActionSheet.Button.default(Text(verbatim: account.nameForDisplay)) {
 				self.subscriptionsExportAccounts = nil
@@ -113,6 +121,7 @@ struct SettingsView : View {
 			}
 			buttons.append(button)
 		}
+		
 		buttons.append(.cancel { self.subscriptionsExportAccounts = nil })
 		return ActionSheet(title: Text("Export Subscriptions..."), message: Text("Select the account to export out of."), buttons: buttons)
 	}