Join sequences

[micheldebree]

A shortcut (ctrl-J?) in the sequence column of a track that joins the next sequence with the current sequence:

• Creates a copy of the current sequence, with the data from the next sequence appended
• Inserts the copy in the sequence list
• Removes the original, and the next sequence in the list
• If the new sequence exceeds the maximum sequence size, an error is shown (how?)

before

a001 c-1
     ---
     c-2
     ---
a002 c-3
     ---
a003 c-4         
     ...

after

a004 c-1
     ---
     c-2
     ---
     c-3
     ---
a003 c-4         
     ...