Start New Sheet import mode should extend to allow more sheets

Version: 2018b

Type: Features

Category: Data Handling

Subcategory: Import Data

Jira: ORG-16460

Maximum number of sheets in one book is 1024, so when Start New Columns to import more than 1024 files, will automatically create new book for importing later files if number of sheets in current Workbook arrives 1024.