NovaSeqX: Add flag for processed samples which will be re-sequenced

[leonschuetz]

NGSD:

• [x] add column to processed_sample table

GSvar:

• [x] add column in sequencing run tab
• [x] add option to select processed sample for re-sequencing in sequencing run tab
  • [x] multiselection
• [x] add warining on opening of a GSvar file

megSAP:

• [x] add automatic merge in copy_sample.php