support searching for next occurrence of needle on row when searching

[kjloveless]

i think intuitively it would make sense to allow the right arrow key to search to the right of a match on the same row, but the arrow key skips the rest of the row and proceeds to the next row.

abc, 1234567, abc

search: abc

currently find only matches the first occurrence in a row. in this case a right arrow input would move match to the second occurrence.