For editing datalists and eg. declaring larger lists
of variables of the same type I think it is most
comfortable to have a multiline cursor.
It should act like the Rectangular selection already
implemented, you can select an rectangular area or a
number of lines in which you want to type.
Nowadays I can select an Area, if I start typing all
selected is deleted and the typed appears only in the
line where the cursor is.
I would appreciate it very much if I would be possible
to alter the whole selection at the same time.