Issue #382: Add 'Create from existing file' option in Tape, Create/Edit (dismine/valentina)

New issue 382: Add ‘Create from existing file’ option in Tape, Create/Edit https://bitbucket.org/valentinateam/valentina/issues/382/add-create-from-existing-file-option-in

Susan Spencer:

Add ‘Create from existing file’ option in Tape, Create/Edit

This option enables a user to quickly create a new measurement file with blank data using an existing measurement file as a template.