Horizontal Coding

[as2388]

• Automatically focus on the next drop-down when changing column (PR #128: Auto-focus next drop-down #129)
• Choose the next active scheme in a logical way (i.e. each message should have schemes presented for coding in the same order). (partially solved by PR #125: Rotate active scheme when starting a new, uncoded row. #130, see comment below)

[as2388]

This should now be a lot better when coding completely uncoded rows.

However, when coding rows which were previously partly coded, the order of the columns may be shuffled when skipping coded schemes. This is because the next row for coding is moved to the left-most column without adjusting the locations of any of the other columns.