Mode of a Sanger read opening

When an ABIF or SCF file is opened in UGENE, show the following dialog:

• The dialog title is "Sanger Read Opening Mode".
• There are three combo boxes inside the dialog, only one of them can be selected at a time:
  • "Open a view for single read"
  • "Map to reference"
  • "Assemble de novo with other reads"
• The last two items should open a corresponding dialog: "Map Sanger Reads to Reference" / "De Novo Assemble Sanger Reads with CAP". The file is specified in the "Reads" field.
• If several files have been selected in the file open dialog, all ABIF/SCF files should be added to one dialog.
• If there is a mix of input file formats (e.g. a user inputs "read1.ab1", "protein.pdb", "read2.ab1"), process the Sanger reads first, then open the other files.