Issue 517 sample naming and 521

Created by: meguiraun

• solving #517 (closed)
  • Cannot select the sample name string displayed in the current queue
  • Naming convention: <sample_name><position_name><run_number>_xxxx.<file_type>
• solving #521 (closed): without removing drag&drop
• also a but where defaultPrefix was lost after a page refresh

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• Not done: rename a sample in # 517